CN105298485A - Comprehensive evaluation method for single well oil gas geology - Google Patents
Comprehensive evaluation method for single well oil gas geology Download PDFInfo
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Abstract
The invention relates to a comprehensive evaluation method for single well petroleum geology. The method comprises the following steps: 1, source rock evaluation; 2, reservoir stratum evaluation; 3, overlying stratum evaluation; 4, entrapment evaluation; 5, oil gas source comparison. According to the comprehensive evaluation method for the single well oil gas geology, the sequence stratigraphy theory serves as guidance, systematic observation of rock debris and the core and sample analysis serve as the bases, physical geography materials such as logging are combined, system partitioned strata are compared with adjoining wells, target stratum series sedimentary facies markers, sedimentary facies types and characteristics, stratigraphic sequence characteristics and sedimentary cycles, structures and structural characteristics are researched, sedimentary facies, cored interval sedimentary microfacies and comprehensive logging interval sedimentary microfacies are partitioned, sedimentary environment analysis is conducted, a single well facies model and whole well sedimentary facies sections are established, the mutual relations between the sedimentary facies and a crude stratum, a reservoir stratum and an overlying stratum are defined, and outlining basis is provided for conducting single well oil gas geology basic element analysis.
Description
Technical field
The present invention relates to a kind of individual well oil-gas geology integrated evaluating method.
Background technology
Subei Basin is the disconnected col type basin of Mesozoic and Cenozoic time, pre-Jurassic substrate by printing-Stage of Yanshan fold Paleozoic group and Triassic Stratigraphic form, the Fashion and Evolution in basin experienced by Depression Stage-break col phase-five depositional phases of Depression Stage Fault-subsidence Stage-period of transfer one.FE recessed interior growth Mesozoic and Cenozoic strata sedimentary rocks in basin, deposit thickness can reach 5200km, major sedimentary is filled with Upper Cretaceous Pukou group (K2p), Chi Shan group (K2c) from bottom to top, Paleogene System Taizhou group (E1t), Funing Formation (E1f), DN group (E2d local), SD group (E2s), the stratum such as Neogene System Yancheng group (Ny) and Quaternary system DT group (Qd).Sedimentation is by tectogenetic control, and after Cretaceous period Mo Yizheng motion, under the control of a series of tension fault activities, Taizhou group, Funing Formation experienced by the subsidence stage that basin entirety declines fast, waters is broad, water body is deepened; Wubao post exercise DN group, SD group, because east northeast facial difference lifting fault activities is very strong, unified lake basin is divided into concavo-convex alternate sedimentary structure view, and people's fault-depression stage is entered in basin; After SD motion, fault activities weakens relatively, and lake basin is withered away, transferred land detrital deposit to, and phase out into subsidence stage by rift again in basin, the middle Pliocene Epoch transfers down warping region concentrating effects to.Except tectonic movement, abstriction play except control action to deposition, the change of weather also affects the division of sedimentation type and parfacies, stratum, study area experienced by the weather of depositional stage the periodicity that warmed moist-more xeothermic-warmed moist one is xeothermic, thus defines numerous depositional environments and sedimentation type.
Mud shale oil-gas reservoir belongs to unconventionaloil pool and hides category, but be different from tight sand oil-gas reservoir, maximum difference is source storage one, therefore oil gas raftings, occurrence status, reservoir space and remodeling method etc. have its unique distinction, domestic still immature to mud shale Evaluation of Oil And Gas method at present, be also in the exploratory stage.In FE section mud shale, see good oil/gas show in view of exploratory area, northern Suzhou has many mouthfuls of wells, very likely become the making & breaking after FSH section, DN Zu Deng main force sandstone oil reservoir, therefore be necessary to establish special topic to carry out exploratory evaluation study.
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome the deficiencies in the prior art, provides a kind of individual well oil-gas geology integrated evaluating method.
The technical solution adopted for the present invention to solve the technical problems is: a kind of individual well oil-gas geology integrated evaluating method, comprises the following steps:
1) Evaluation of source rocks: in the middle part of the FE section of hydrocarbon source rock, FSH section and FS section top mud shale carry out equidistant sampling and testing analysis, Measurement results and geochemical logging analysis result are compared;
2) evaluating reservoir: the sand group below oil-bearing layer position is cored analysis, utilize ordinary sheet and total rock data analysis, according to the classification schemes of China National Petroleum Corporation's standard sandstone, carry out the projection of triangle end member, measure the arkose of the section of coring and the predominant amount of feldspar;
3) Cap Assessment: choose the parameter index that the parameters such as degree of porosity, depth of cover, thickness in monolayer, mud ground and depositional environment calculate sealing ability of cap rock;
4) evaluation of trap: using trap as evaluation unit is the main method of concrete exploration targets petroleum resources amount and CALCULATING OILFIELD oil in place, and adopt volumetric method to calculate the stock number of structural trap, design formulas is:
Q=0.01·Ao·h·Φ·So·Boi，
Wherein: Q is petroleum geology stock number, Ao is oil area, and h is effective thickness,
Φ is effecive porosity, and So is oil saturation, and Boi is oil volume factor in formation;
5) petroleum source correlation: utilize fingerprint technique to contrast, finds the affiliation between crude oil and hydrocarbon source rock.
As preferably, in step 1), adopt maceral classification and the organic matter of Pyro-GC classification to hydrocarbon source rock to analyze, and then determine the developmental state of hydrocarbon source rock organic matter.
As preferably, step 2) in, to the RESERVOIR PORE STRUCTURE of lower sand group reservoir, replacement pressure, hollow billet curve, partially thin flexure feature are analyzed, and draw lower sand group Reservoir type.
As preferably, in step 3), according to the grade of the contribution of sealing ability of cap rock being established to parameters index.
The invention has the beneficial effects as follows, this individual well oil-gas geology integrated evaluating method is instruct with Based On Sequence Stratigraphic Theory, landwaste is observed with system, based on rock core and sample analysis, in conjunction with geophysical informations such as well loggings, system divides stratum and and offset wells correlation, research purpose series of strata On The Sedimentary Facies Marks, type of sedimentary facies and feature, characteristics of the stratigraphic sequence, the cycle of sedimentation, structure, structural feature, Division of Sedimentary Facies and cored interval, comprehensive logging well section sedimentary micro, carry out SEDIMENTARY ENVIRONMENT, set up single well facies pattern and full well sedimentary facies section, specify sedimentary facies and raw correlation of storing up cap rock, summary foundation is provided for individual well carries out the analysis of oil-gas geology fundamental.
Detailed description of the invention
A kind of individual well oil-gas geology integrated evaluating method, comprises the following steps:
1) Evaluation of source rocks: in the middle part of the FE section of hydrocarbon source rock, FSH section and FS section top mud shale carry out equidistant sampling and testing analysis, Measurement results and geochemical logging analysis result are compared;
2) evaluating reservoir: the sand group below oil-bearing layer position is cored analysis, utilize ordinary sheet and total rock data analysis, according to the classification schemes of China National Petroleum Corporation's standard sandstone, carry out the projection of triangle end member, measure the arkose of the section of coring and the predominant amount of feldspar;
3) Cap Assessment: choose the parameter index that the parameters such as degree of porosity, depth of cover, thickness in monolayer, mud ground and depositional environment calculate sealing ability of cap rock;
4) evaluation of trap: using trap as evaluation unit is the main method of concrete exploration targets petroleum resources amount and CALCULATING OILFIELD oil in place, and adopt volumetric method to calculate the stock number of structural trap, design formulas is:
Q=0.01·Ao·h·Φ·So·Boi，
Wherein: Q is petroleum geology stock number, Ao is oil area, and h is effective thickness,
Φ is effecive porosity, and So is oil saturation, and Boi is oil volume factor in formation;
5) petroleum source correlation: utilize fingerprint technique to contrast, finds the affiliation between crude oil and hydrocarbon source rock.
As preferably, in step 1), adopt maceral classification and the organic matter of Pyro-GC classification to hydrocarbon source rock to analyze, and then determine the developmental state of hydrocarbon source rock organic matter.
As preferably, step 2) in, to the RESERVOIR PORE STRUCTURE of lower sand group reservoir, replacement pressure, hollow billet curve, partially thin flexure feature are analyzed, and draw lower sand group Reservoir type.
As preferably, in step 3), according to the grade of the contribution of sealing ability of cap rock being established to parameters index.
Compared with prior art, this individual well oil-gas geology integrated evaluating method is instruct with Based On Sequence Stratigraphic Theory, landwaste is observed with system, based on rock core and sample analysis, in conjunction with geophysical informations such as well loggings, system divides stratum and and offset wells correlation, research purpose series of strata On The Sedimentary Facies Marks, type of sedimentary facies and feature, characteristics of the stratigraphic sequence, the cycle of sedimentation, structure, structural feature, Division of Sedimentary Facies and cored interval, comprehensive logging well section sedimentary micro, carry out SEDIMENTARY ENVIRONMENT, set up single well facies pattern and full well sedimentary facies section, specify sedimentary facies and raw correlation of storing up cap rock, summary foundation is provided for individual well carries out the analysis of oil-gas geology fundamental.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on manual, must determine its technical scope according to right.
Claims (4)
1. an individual well oil-gas geology integrated evaluating method, is characterized in that, comprises the following steps:
1) Evaluation of source rocks: in the middle part of the FE section of hydrocarbon source rock, FSH section and FS section top mud shale carry out equidistant sampling and testing analysis, Measurement results and geochemical logging analysis result are compared;
2) evaluating reservoir: the sand group below oil-bearing layer position is cored analysis, utilize ordinary sheet and total rock data analysis, according to the classification schemes of China National Petroleum Corporation's standard sandstone, carry out the projection of triangle end member, measure the arkose of the section of coring and the predominant amount of feldspar;
3) Cap Assessment: choose the parameter index that the parameters such as degree of porosity, depth of cover, thickness in monolayer, mud ground and depositional environment calculate sealing ability of cap rock;
4) evaluation of trap: using trap as evaluation unit is the main method of concrete exploration targets petroleum resources amount and CALCULATING OILFIELD oil in place, and adopt volumetric method to calculate the stock number of structural trap, design formulas is:
Q=0.01·Ao·h·Φ·So·Boi，
Wherein: Q is petroleum geology stock number, Ao is oil area, and h is effective thickness,
Φ is effecive porosity, and So is oil saturation, and Boi is oil volume factor in formation;
5) petroleum source correlation: utilize fingerprint technique to contrast, finds the affiliation between crude oil and hydrocarbon source rock.
2. individual well oil-gas geology integrated evaluating method as claimed in claim 1, is characterized in that, in step 1), adopts maceral classification and the organic matter of Pyro-GC classification to hydrocarbon source rock to analyze, and then determines the developmental state of hydrocarbon source rock organic matter.
3. individual well oil-gas geology integrated evaluating method as claimed in claim 1, is characterized in that, step 2) in, to the RESERVOIR PORE STRUCTURE of lower sand group reservoir, replacement pressure, hollow billet curve, partially thin flexure feature are analyzed, and draw lower sand group Reservoir type.
4. individual well oil-gas geology integrated evaluating method as claimed in claim 1, is characterized in that, in step 3), according to the grade of the contribution of sealing ability of cap rock being established to parameters index.
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| CN105804733A (en) * | 2016-03-17 | 2016-07-27 | 成都创源油气技术开发有限公司 | Shale oil logging evaluation method |
| CN107589466A (en) * | 2016-07-06 | 2018-01-16 | 中国石油化工股份有限公司 | A kind of method for evaluating undiscovered resources quantity space distribution characteristics |
| CN107676082A (en) * | 2016-08-01 | 2018-02-09 | 中国石油化工股份有限公司 | With the method for well logging resultant curve amendment core oil saturation |
| CN107965314A (en) * | 2016-10-18 | 2018-04-27 | 中国石油化工股份有限公司 | The computational methods of glutenite structural oil pool oil columns |
| CN109061765A (en) * | 2018-09-26 | 2018-12-21 | 西南石油大学 | The evaluation of trap method of heterogeneous thin sandstone alternating layers oil reservoir |
| CN109630090A (en) * | 2018-10-30 | 2019-04-16 | 中国石油天然气集团有限公司 | Store up lid combination logging evaluation method and device |
| CN110656934A (en) * | 2019-10-08 | 2020-01-07 | 中国石油天然气股份有限公司 | Compacted-stratum-removing comparison method for compact sandstone reservoir |
| CN110749940A (en) * | 2018-07-23 | 2020-02-04 | 中国石油化工股份有限公司 | Quantitative configuration method for exploring reserve source constitution of crude oil depression |
| CN112835127A (en) * | 2021-01-07 | 2021-05-25 | 北京油源恒业科技有限公司 | Land basin oil source rock dividing method based on sand-shale interbed combination |
| CN113836684A (en) * | 2020-06-08 | 2021-12-24 | 中国石油化工股份有限公司 | Oil gas storage unit evaluation method and device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804733A (en) * | 2016-03-17 | 2016-07-27 | 成都创源油气技术开发有限公司 | Shale oil logging evaluation method |
| CN107589466A (en) * | 2016-07-06 | 2018-01-16 | 中国石油化工股份有限公司 | A kind of method for evaluating undiscovered resources quantity space distribution characteristics |
| CN107676082A (en) * | 2016-08-01 | 2018-02-09 | 中国石油化工股份有限公司 | With the method for well logging resultant curve amendment core oil saturation |
| CN107676082B (en) * | 2016-08-01 | 2020-07-14 | 中国石油化工股份有限公司 | Method for correcting oil saturation of rock core by using logging synthetic curve |
| CN107965314A (en) * | 2016-10-18 | 2018-04-27 | 中国石油化工股份有限公司 | The computational methods of glutenite structural oil pool oil columns |
| CN110749940A (en) * | 2018-07-23 | 2020-02-04 | 中国石油化工股份有限公司 | Quantitative configuration method for exploring reserve source constitution of crude oil depression |
| CN109061765B (en) * | 2018-09-26 | 2020-03-17 | 西南石油大学 | Trap evaluation method for heterogeneous thin sandstone interbed reservoir |
| CN109061765A (en) * | 2018-09-26 | 2018-12-21 | 西南石油大学 | The evaluation of trap method of heterogeneous thin sandstone alternating layers oil reservoir |
| CN109630090B (en) * | 2018-10-30 | 2020-03-10 | 中国石油天然气集团有限公司 | Storage cover combined well logging evaluation method and device |
| CN109630090A (en) * | 2018-10-30 | 2019-04-16 | 中国石油天然气集团有限公司 | Store up lid combination logging evaluation method and device |
| CN110656934A (en) * | 2019-10-08 | 2020-01-07 | 中国石油天然气股份有限公司 | Compacted-stratum-removing comparison method for compact sandstone reservoir |
| CN110656934B (en) * | 2019-10-08 | 2024-04-30 | 中国石油天然气股份有限公司 | Compaction-removing stratum comparison method for tight sandstone reservoir |
| CN113836684A (en) * | 2020-06-08 | 2021-12-24 | 中国石油化工股份有限公司 | Oil gas storage unit evaluation method and device |
| CN112835127A (en) * | 2021-01-07 | 2021-05-25 | 北京油源恒业科技有限公司 | Land basin oil source rock dividing method based on sand-shale interbed combination |
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