CN105626054A - Method for subtly depicting broken edges of thick-layer fault block oil reservoir - Google Patents
Method for subtly depicting broken edges of thick-layer fault block oil reservoir Download PDFInfo
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Abstract
The invention provides a method for subtly depicting broken edges of a thick-layer fault block oil reservoir. The method comprises the steps that subtle stratigraphic correlation is conducted, and the position of a breakpoint encountered during well point drilling is reasonably determined; through fault structure subtle interpretation, the fault form and a plane combination rule are identified and described; well inclination data are corrected so as to ensure the accuracy of the breakpoint encountered during well point drilling and stratified data underground locations; and a three-dimensional geological model serves as the support and platform, fault data of the breakpoint and seismic interpretation of geological research comparison are integrated in the three-dimensional geological model, through well-seismic mutual calibration, well data points are inlayed in a seismic interpretation face, and with the well-seismic-model combination, the broken edge form is subtly depicted. According to the method for subtly depicting the broken edges, on the basis of subtle broken edge depiction, the potential of remaining oil nearby a fault in the later stage of exploitation is successfully dug by using fault-near horizontal well, new exploitation of a thick-layer-near abandoned layer is achieved, and a feasible method is provided for digging the potential of the remaining oil nearby the fault in the later stage of exploitation.
Description
Technical field
The present invention relates to fault block oil reservoir tomography research field, the method especially relating to the disconnected rib meticulous depiction of a kind of fault block oil reservoir.
Background technology
Thick-layer fault block oil reservoir has that thickness in monolayer is big, reserves are big, the geology characteristic that reserves abundance is high, the well pattern form generally adopted in such oil reservoir development is to push up close limit note height rare, low to adopt mode, go through and develop for many years, big multiple-unit has been enter into the ultra-high water-containing stage at present, recovery percent of reserves is high, and the general High water cut of straight well stops production for many years, and oil reservoir is in nearly discarded state. Enter under combined effect at fault barrier and bottom water coning and limit overflow, tomography one line structure high-order bit remaining oil is enriched with relatively, but it mostly is fillet banding pattern enrichment region, oil-containing strip width 50-100m, utilizes straight well to tap the latent power, deficiency in economic performance, moisture rising is fast, recovery ratio is low, and utilizes the remaining oil of the nearly tomography in nearly tomography horizontal well locus high-order bit, it is possible to be greatly improved the recovery ratio of such oil reservoir. How to tap the latent power the remaining oil of nearly near Faults in such thick-layer fault block oil reservoir High water cut stage, need us that tomography and the fault combination of remaining oil enriched area are carried out accurate description, especially want fine description to go out the horizontal well target zone position upper and lower dish of tomography and the intersection position of the aspect i.e. position of disconnected rib. The method that we have invented the disconnected rib meticulous depiction of a kind of new thick-layer fault block oil reservoir for this, solves above technical problem.
Summary of the invention
The method that it is an object of the invention to provide the disconnected rib of a kind of thick-layer fault block oil reservoir meticulous depiction, solves development late stage thick-layer fault block oil reservoir near Faults remaining oil and effectively taps the latent power problem, it is achieved that nearly discarded thick-layer fault block oil reservoir newly melt the purpose sent out.
The purpose of the present invention can be achieved by the following technical measures: the method for the disconnected rib meticulous depiction of thick-layer fault block oil reservoir, and the method for the disconnected rib meticulous depiction of this thick-layer fault block oil reservoir includes: step 1, carries out fine Strata Comparison, rationally determines that well point is bored and meets breakpoint location; Step 2, by fault tectonic Fine structural interpretation, identifies and describes form and the plane combination rule of tomography; Hole deviation data are modified by step 3, to ensure that the accuracy of breakpoint and the individual-layer data underground position met is bored in well point; And step 4, support three-dimensional geological model is platform, and the breakpoint, the layer data of seismic interpretation that are contrasted by geological research are integrated in three-dimensional geological model, demarcated mutually by well, shake, making well data point be embedded on seismic interpretation face, well, shake, mould combine, and meticulous depiction breaks prismatic state.
The purpose of the present invention realizes also by following technical measures:
In step 1, utilize geology, well logging, well logging, seismic data, dynamically these data, principle according to " index bed controls, the cycle of sedimentation contrasts ", consider structure, the cycle of sedimentation, sedimentary facies, oil water relation many factors comprehensively, set up multi-direction foundation and contrast skeleton section and many well groups conjunction contrast section, contrast multiple breakpoint, rationally determine that well point is bored and meet breakpoint location.
In step 1, first, multi-direction contrast skeleton of setting up, in formation plane, in multiple spot, longitudinal direction, multistage controls, and the contrast to ensure point-line-face is unified; Secondly, many well groups build vertical contrast section jointly, set up complete contrast section, it is ensured that the reasonability and reliability of meeting breakpoint contrast are bored in well point.
In step 2, simulate under the guidance of achievement in tectonic stress field, utilize the clear and definite mature fault rule of actual configuration pattern, adopt the clear and definite fracture system combination rule of horizon slice coherence analysis, explain that the position of accurate description every tomography section on section divides Sand member to carry out the plane combination of tomography according to the similarity of adjacent sections by encrypting vertical/horizontal survey line, finally the fracture system of multiple Sand member is overlapped, verify reasonability and the accuracy of sectional space spread.
In step 3, to well control fault plane paramophia place, utilize stratigraphic structure line to change lofty predicted method, disconnected prismatic state distorts predicted method, straight well hole deviation is modified by oil-water boundary mutation forecasting method, the lofty predicted method of fault plane variation tendency, reservoir thickness prediction method, efficient solution resolution rib horizontal control point abnormal problem.
In step 4, using the breakpoint data of Strata Comparison and aspect individual-layer data, the tomography polygon of seismic interpretation and end face structure data as data source, utilize breakpoint data to retrain seismic interpretation fault plane to obtain rational FAULT MODEL, well point individual-layer data constraint seismic interpretation end face structure is utilized to generate the end face structure of target zone, FAULT MODEL is crossed with target zone end face structure, it is determined that the plan-position of disconnected rib and the form of tomography.
The method of the disconnected rib meticulous depiction of the thick-layer fault block oil reservoir in the present invention, it is on the basis of fine geological study and fine structural interpretation and hole deviation data correction, the layer data meeting breakpoint data and seismic interpretation is bored in the well point that fine geology contrast is determined, it is integrated in three-dimensional geological model, utilize breakpoint data constraint to shake explanation fault plane and obtain rational FAULT MODEL, well point individual-layer data constraint seismic interpretation end face structure is utilized to generate the end face structure of target zone, FAULT MODEL is crossed with target zone end face structure, finally determine the plan-position of disconnected rib and the form of tomography. compared with the method in the past relying primarily on the disconnected prismatic state of seismic interpretation description, the method efficiently solves the problem that the position of fault of structure interpretation is concentrated mainly on Sand member interface, achieve the increase along with formation thickness, the meticulous depiction of the rib position in different layers position and the form of breaking, disconnected rib plan-position interpretation errors is controlled below 5 meters, it is achieved that effectively taping the latent power of near Faults remaining oil enriched area. on the basis of disconnected rib meticulous depiction, nearly tomography horizontal well is utilized successfully to tap the latent power the remaining oil of development late stage near Faults, it is achieved that newly melting of the nearly waste layer of thick-layer is sent out. the method of the disconnected rib meticulous depiction of a kind of thick-layer fault block oil reservoir in the present invention, technical thought is clear, application is simple, provides practicable method for realizing development late stage near Faults Tapping Residual Oil.
Accompanying drawing explanation
The method that Fig. 1 is the disconnected rib meticulous depiction of a kind of thick-layer fault block oil reservoir of the present invention is applied to a flow chart being embodied as example;
Fig. 2 is that the one of the present invention is embodied as in example passing fault East and West direction Strata Comparison profile;
Fig. 3 is that the one of the present invention is embodied as in example coherence slice and analyzes fault plane regularity of distribution figure;
Fig. 4 is that to be embodied as in example layering be fault plane constitutional diagram to the one of the present invention;
Fig. 5 is the different Sand member fault planes combination overlapping figure that the one of the present invention is embodied as in example;
Fig. 6 is the straight well hole deviation spacial migration figure that the one of the present invention is embodied as in example;
Fig. 7 is the FAULT MODEL figure that the one of the present invention is embodied as in example;
Fig. 8 is the tectonic model figure that the one of the present invention is embodied as in example;
Fig. 9 is the nearly tomography horizontal well path figure that the one of the present invention is embodied as in example.
Detailed description of the invention
For making the above and other purpose of the present invention, feature and advantage to become apparent, cited below particularly go out preferred embodiment, and coordinate institute's accompanying drawings, be described in detail below.
As it is shown in figure 1, the flow chart of the method for the disconnected rib meticulous depiction of thick-layer fault block oil reservoir that Fig. 1 is the present invention.
In a step 101, by fine Strata Comparison, rationally determine that the position meeting breakpoint is bored in well point. First, multi-direction contrast skeleton of setting up, in formation plane, in multiple spot, longitudinal direction, multistage controls, and the contrast to ensure point-line-face is unified; Secondly, many well groups build vertical contrast section jointly, set up complete contrast section, it is ensured that the reasonability and reliability of meeting breakpoint contrast are bored in well point. In one embodiment, utilize geology, well logging, well logging, seismic data, the data such as dynamic, principle according to " index bed controls, the cycle of sedimentation contrasts ", consider the many factors such as structure, the cycle of sedimentation, sedimentary facies, oil water relation comprehensively, set up multi-direction foundation and contrast skeleton section and many well groups conjunction contrast section, compared for 120 mouthfuls of wells and bore more than 50 breakpoint met, be reasonably determined aboveground breakpoint location. Fig. 2 is the target area Strata Comparison profile in a specific embodiment of the present invention. Flow process enters into step 102.
In a step 102, by fault tectonic Fine structural interpretation, identify and describe form and the plane combination rule of tomography. Simulate under the guidance of achievement in tectonic stress field, utilize the clear and definite mature fault rule of actual configuration pattern, adopt the clear and definite fracture system combination rule of horizon slice coherence analysis, explain by encrypting vertical/horizontal survey line, the position of accurate description every tomography section on section, similarity according to adjacent sections divides Sand member to carry out the plane combination of tomography, finally the fracture system of multiple Sand member is overlapped, and verifies reasonability and the accuracy of sectional space spread.
In one embodiment, the combination of seismic interpretation coherent analysis technology, fault plane and the checking of longitudinal overlapping is utilized to specify that 3-1 complex fault block district fracture system plane configuration and combination rule forever. In figure 3, utilize coherent body technique to portray fault plane characteristics of combination, improve precision and the accuracy of fault interpretation. In the diagram, explain by encrypting vertical/horizontal survey line, on the basis of the cross section place of section every tomography of accurate description, similarity according to adjacent sections is layered system and carries out fault plane combination, verify in conjunction with dropping cut slice, coherence slice, position of fault and development length, combination connecting mode to different tomographies go over, and layering system realizes the plane reasonable combination of tomography. In Figure 5, different Sand member fault plane combinations are overlapped, verifies correctness and the reasonability of fault combination and spatial further. By the fracture system in multiple reflecting layer is coincided, demonstrate reasonability and the accuracy of fault plane combination and sectional space spread. Flow process enters into step 103.
In step 103, hole deviation data are modified, to ensure that the accuracy of breakpoint and the individual-layer data underground position met is bored in well point. To well control fault plane paramophia place, utilize stratigraphic structure line to change lofty predicted method, disconnected prismatic state distorts predicted method, straight well hole deviation is modified by oil-water boundary mutation forecasting method, the lofty predicted method of fault plane variation tendency, reservoir thickness prediction method, efficient solution resolution rib horizontal control point abnormal problem.
Due to Complex Fault Block Oil Reservoir mature fault, stratigraphic dip change greatly, formation lithology diversity greatly, straight well hole deviation ubiquity, some straight well cannot carry out deviational survey work due to engineering reasons and ground reason, cause straight well space actual position and current position, can there is bigger error, in figure 6, the locus of the 14 mouthfuls of straight wells in example district has been carried out proportional space playback by application straight well hole deviation spacial migration Forecasting Methodology. Ensure that the actual accuracy boring breakpoint and the individual-layer data underground position met in well point, relieve the unreasonable situation existed in research.
At step 104, support three-dimensional geological model is platform, and the breakpoint, the layer data of seismic interpretation that are contrasted by geological research are integrated in three-dimensional geological model, demarcated mutually by well, shake, making well data point " inlaying " on seismic interpretation face, well, shake, mould combine, and meticulous depiction breaks prismatic state. Using the breakpoint data of Strata Comparison and aspect individual-layer data, the tomography polygon of seismic interpretation and end face structure data as data source, utilize breakpoint data to retrain seismic interpretation fault plane to obtain rational FAULT MODEL, well point individual-layer data constraint seismic interpretation end face structure is utilized to generate the end face structure of target zone, FAULT MODEL is crossed with target zone end face structure, it is determined that the plan-position of disconnected rib and the form of tomography.
In one embodiment, in figure 6, more than 50 the breakpoint data met are bored in fine Strata Comparison well point and is input in geological model, 22 fracture system achievements of the different Sand member of precise seismic interpretation are simultaneously entered in progressive die type, according to different Sand member fracture system planar characteristics of distribution, utilize the fault modeling function of petrel software, portray tomography space developmental morphology, and utilize the position of aboveground breakpoint that fault plane is corrected, demarcated mutually by well, shake, make well data point " inlaying " on seismic interpretation face, set up fine FAULT MODEL. In the figure 7, utilize the collaborative end face structure data explained of well shake, individual-layer data in conjunction with dense well pattern Stratigraphic Division And Correlation, the mode that well point interpolation, earthquake control is adopted to set up target zone end face tectonic model, ensure that being identical of well point place and geological layering data, the concordance of variation tendency and seismic interpretation between well. In fig. 8, the FAULT MODEL of foundation and target zone end face tectonic model are met at three dimensions to cross, it is determined that the plan-position of the disconnected rib in different layers position and the form of tomography.
The technology of the present invention thinking is clear, application simple, effectively taps the latent power provide practicable method for realizing development late stage near Faults remaining oil. The method obtains application in Dongxing oil fields in Shengli Yong'an oilfield 3-1 complex fault block district forever, on the basis that disconnected rib meticulous depiction and remaining oil are analyzed, along structure high-order bit tomography one line, devise 5 mouthfuls of water horizontal wells, wherein nearly tomography horizontal well 2 mouthfuls, around cone of horizontal well, across fault block horizontal well, meet each 1 mouthful of tomography horizontal well. Target spot average 12 meters of the tomography of distance of 5 mouthfuls of nearly tomography horizontal well designs, in fig .9, the flat 8 well B target spots distance tomographies of 3-only 4 meters recently, have challenged the limit of nearly tomography design level well forever.
Claims (6)
1. the method for the disconnected rib meticulous depiction of thick-layer fault block oil reservoir, it is characterised in that the method for the disconnected rib meticulous depiction of this thick-layer fault block oil reservoir includes:
Step 1, carries out fine Strata Comparison, rationally determines that well point is bored and meets breakpoint location;
Step 2, by fault tectonic Fine structural interpretation, identifies and describes form and the plane combination rule of tomography;
Hole deviation data are modified by step 3, to ensure that the accuracy of breakpoint and the individual-layer data underground position met is bored in well point; And
Step 4, support three-dimensional geological model is platform, and the breakpoint, the layer data of seismic interpretation that are contrasted by geological research are integrated in three-dimensional geological model, demarcated mutually by well, shake, making well data point be embedded on seismic interpretation face, well, shake, mould combine, and meticulous depiction breaks prismatic state.
2. the method for the disconnected rib meticulous depiction of thick-layer fault block oil reservoir according to claim 1, it is characterized in that, in step 1, utilize geology, well logging, well logging, seismic data, dynamically these data, according to the principle of " index bed controls, the cycle of sedimentation contrasts ", consider structure, the cycle of sedimentation, sedimentary facies, oil water relation many factors comprehensively, set up multi-direction foundation contrast skeleton section and many well groups close contrast section, contrast multiple breakpoint, rationally determine that well point is bored and meet breakpoint location.
3. the method for the disconnected rib meticulous depiction of thick-layer fault block oil reservoir according to claim 2, it is characterised in that in step 1, first, multi-direction contrast skeleton of setting up, in formation plane, in multiple spot, longitudinal direction, multistage controls, and the contrast to ensure point-line-face is unified; Secondly, many well groups build vertical contrast section jointly, set up complete contrast section, it is ensured that the reasonability and reliability of meeting breakpoint contrast are bored in well point.
4. the method for the disconnected rib meticulous depiction of thick-layer fault block oil reservoir according to claim 1, it is characterized in that, in step 2, simulate under the guidance of achievement in tectonic stress field, utilize the clear and definite mature fault rule of actual configuration pattern, adopt the clear and definite fracture system combination rule of horizon slice coherence analysis, explain by encrypting vertical/horizontal survey line, the position of accurate description every tomography section on section, similarity according to adjacent sections divides Sand member to carry out the plane combination of tomography, finally the fracture system of multiple Sand member is overlapped, the reasonability of checking sectional space spread and accuracy.
5. the method for the disconnected rib meticulous depiction of thick-layer fault block oil reservoir according to claim 1, it is characterized in that, in step 3, to well control fault plane paramophia place, utilize stratigraphic structure line to change lofty predicted method, disconnected prismatic state distorts predicted method, straight well hole deviation is modified by oil-water boundary mutation forecasting method, the lofty predicted method of fault plane variation tendency, reservoir thickness prediction method, efficient solution resolution rib horizontal control point abnormal problem.
6. the method for the disconnected rib meticulous depiction of thick-layer fault block oil reservoir according to claim 1, it is characterized in that, in step 4, using the breakpoint data of Strata Comparison and aspect individual-layer data, the tomography polygon of seismic interpretation and end face structure data as data source, utilize breakpoint data to retrain seismic interpretation fault plane to obtain rational FAULT MODEL, well point individual-layer data constraint seismic interpretation end face structure is utilized to generate the end face structure of target zone, FAULT MODEL is crossed with target zone end face structure, it is determined that the plan-position of disconnected rib and the form of tomography.
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| CN107013207A (en) * | 2017-04-28 | 2017-08-04 | 中国石油化工股份有限公司 | A kind of method for obtaining Complex Fault Block Oil Reservoir sand body underground well location information |
| CN107870364A (en) * | 2016-09-23 | 2018-04-03 | 中国石油天然气股份有限公司 | A kind of modification method and device of seismic data interpretation data |
| CN108074282A (en) * | 2016-11-08 | 2018-05-25 | 中国石油化工股份有限公司 | The thickness correction method of physical parameter based on three-dimensional geological modeling software |
| CN108242069A (en) * | 2016-12-23 | 2018-07-03 | 中国石油化工股份有限公司 | Oil reservoir section compilation method based on seismic profile deep relationship in time |
| CN109557580A (en) * | 2017-09-27 | 2019-04-02 | 中国石油化工股份有限公司 | A kind of seismic interpretation method of tomography |
| CN110424955A (en) * | 2019-06-19 | 2019-11-08 | 中国石油化工股份有限公司 | A kind of complex fault block inside Tapping Potential Method |
| CN110671096A (en) * | 2019-10-08 | 2020-01-10 | 重庆科技学院 | Carbonate rock fault block oil reservoir sectional flow control oil extraction test device |
| CN111458751A (en) * | 2019-01-22 | 2020-07-28 | 中国石油天然气股份有限公司 | Comprehensive time depth calibration method and device |
| CN112327365A (en) * | 2020-11-06 | 2021-02-05 | 大庆油田有限责任公司 | Complex fault block structure modeling method |
| CN113537520A (en) * | 2021-06-29 | 2021-10-22 | 中国石油化工股份有限公司 | Fault position positioning method |
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| CN107870364A (en) * | 2016-09-23 | 2018-04-03 | 中国石油天然气股份有限公司 | A kind of modification method and device of seismic data interpretation data |
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| CN110424955A (en) * | 2019-06-19 | 2019-11-08 | 中国石油化工股份有限公司 | A kind of complex fault block inside Tapping Potential Method |
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| CN110671096A (en) * | 2019-10-08 | 2020-01-10 | 重庆科技学院 | Carbonate rock fault block oil reservoir sectional flow control oil extraction test device |
| CN112327365A (en) * | 2020-11-06 | 2021-02-05 | 大庆油田有限责任公司 | Complex fault block structure modeling method |
| CN112327365B (en) * | 2020-11-06 | 2022-07-26 | 大庆油田有限责任公司 | Complex fault block structure modeling method |
| CN113537520A (en) * | 2021-06-29 | 2021-10-22 | 中国石油化工股份有限公司 | Fault position positioning method |
| CN113537520B (en) * | 2021-06-29 | 2024-05-28 | 中国石油化工股份有限公司 | Fault position locating method |
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