CN107515957A - Mud shale SEQUENCE STRATIGRAPHIC DIVISION method - Google Patents

Mud shale SEQUENCE STRATIGRAPHIC DIVISION method Download PDF

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Publication number
CN107515957A
CN107515957A CN201610442252.9A CN201610442252A CN107515957A CN 107515957 A CN107515957 A CN 107515957A CN 201610442252 A CN201610442252 A CN 201610442252A CN 107515957 A CN107515957 A CN 107515957A
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China
Prior art keywords
sequence
stratigraphic
feature
mud shale
division method
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CN201610442252.9A
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Chinese (zh)
Inventor
郝雪峰
杨万芹
王学军
杜学斌
王勇
姜秀芳
朱德燕
刘华夏
银燕
丁桔红
宁方兴
朱德顺
刘克奇
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China Petroleum and Chemical Corp
Exploration and Development Research Institute of Sinopec Henan Oilfield Branch Co
Exploration and Development Research Institute of Sinopec Shengli Oilfield Co
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China Petroleum and Chemical Corp
Exploration and Development Research Institute of Sinopec Henan Oilfield Branch Co
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Priority to CN201610442252.9A priority Critical patent/CN107515957A/en
Publication of CN107515957A publication Critical patent/CN107515957A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06QINFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06Electricity, gas or water supply

Abstract

The present invention provides a kind of mud shale SEQUENCE STRATIGRAPHIC DIVISION method, and the mud shale SEQUENCE STRATIGRAPHIC DIVISION method includes:Step 1, extract rock core sample and obtain element data and feature of fabric;Step 2, according to the feature of element, analysis geologic climate, paleao-water depth, paleosalinity, ancient redox these environmental evolution features;Step 3, sequence cycle standard is pressed with principle of sequence stratigraphy, determines subsequence set interface feature;Step 4, the corresponding relation established between gamma ray curve and subsequence set and sequence interface, Stratigraphic framework section is established;Step 5, whole district's SEQUENCE STRATIGRAPHIC DIVISION is carried out, draws SEQUENCE STRATIGRAPHIC distribution plane figure, analyzes sequence distribution of strata rule.The mud shale SEQUENCE STRATIGRAPHIC DIVISION method solves sequence interface identification and two problems of whole district's SEQUENCE STRATIGRAPHIC fine correlation, and whole method is workable, and effective technical support is provided for the exploration deployment of shale oil gas.

Description

Mud shale SEQUENCE STRATIGRAPHIC DIVISION method
Technical field
The present invention relates to sequence stratigraphy field, especially relates to a kind of mud shale SEQUENCE STRATIGRAPHIC DIVISION method.
Background technology
Unconventional shale petroleum resources as one of important object of oil-gas exploration, be exploration key areas and after Standby position.Compared with rudaceous rock and carbonate rock series, mud shale sequence stratigraphy abnormal frame Joints are still shallow.Traditional SEQUENCE STRATIGRAPHIC Learn mud shale section as a sequence, i.e. trangressive system tract divides, and fine demarcation is carried out not inside it and divides Analysis, but mud shale is not stratum and same isotropic body spatially, a variety of three-dimensional deposition structures carried be present, construct and Different Lithofacies Types.How to go to portray the anisotropism of mud shaleMud is studied under which type of Geological Scale or Stratigraphic framework The regularity of distribution of shaleAll it is difficult point.
At present, mud shale SEQUENCE STRATIGRAPHIC DIVISION method mainly has three kinds, i.e. origin cause of formation SEQUENCE STRATIGRAPHIC DIVISION method, gamma spectra rotation Return analytic approach and chemical-sequence stratigraphy method.Genetic sequence stratigraphy is using maximum flood surface as sequence interface, beneficial to system tract Identification, but be detrimental to carry out whole district SEQUENCE STRATIGRAPHIC contrast.Gamma spectra Cyclic Analysis method is based primarily upon in mud shale because heavy The difference of a variety of Lithofacies Types lithofacies assemblages pattern during RELATIVE SEA LEVEL eustasy caused by product environmental change, by rock Erosion surface etc. is entered as the key for establishing SEQUENCE STRATIGRAPHIC, gamma spectra Cyclic Analysis in cycle superposed pattern, condensed section and the sea of phase Method contrasts beneficial to the whole district, but sequence interface identification is difficult.Chemical-sequence stratigraphy method is by analyzing, studying chemical element, steady Determine anomalous variation rule of the isotope near bed boundary, quantitative stratigraphy and chemostratigraphy are combined closely, ground Study carefully the regularity of distribution of the characteristic chemical element for being available for region to carry out stratigraphic partition and correlation in the earth formation and stable isotope, with This inquires into the division of stratigraphic boundary and contrast, and chemical-sequence stratigraphy method is beneficial to the identification of sequence interface, but be unfavorable for carrying out Whole district's Strata Comparison.For this we have invented a kind of new mud shale SEQUENCE STRATIGRAPHIC DIVISION method, solves above technical problem.
The content of the invention
Mud shale layer is mainly divided by element and evolution of sedimentary environment and GR curves it is an object of the invention to provide a kind of The mud shale SEQUENCE STRATIGRAPHIC DIVISION method on sequence stratum.
The purpose of the present invention can be achieved by the following technical measures:Mud shale SEQUENCE STRATIGRAPHIC DIVISION method, the mud shale SEQUENCE STRATIGRAPHIC DIVISION method includes:Step 1, extract rock core sample and obtain element data and feature of fabric;Step 2, according to member The feature of element, analysis geologic climate, paleao-water depth, paleosalinity, ancient redox these environmental evolution features;Step 3, with SEQUENCE STRATIGRAPHIC Learn principle and press sequence cycle standard, determine subsequence set interface feature;Step 4, establish gamma ray curve and subsequence set and Corresponding relation between sequence interface, establish Stratigraphic framework section;Step 5, whole district's SEQUENCE STRATIGRAPHIC DIVISION is carried out, draws SEQUENCE STRATIGRAPHIC Distribution plane figure, analyze sequence distribution of strata rule.
The purpose of the present invention can be also achieved by the following technical measures:
In step 1, several mouthfuls of wells are bored in work area, rock core sample is extracted from every mouthful of well, rock core is obtained by core observation Architectural feature, including lamellar, stratiform and bulk;By analytical test, element data and rock constituents data are obtained.
In step 2, according to the feature of these elements of Ca, Mg, Fe, Mn, Th, Sr, analysis geologic climate, paleao-water depth, ancient salt Degree and these environmental evolution features of ancient redox.
In step 3, based on principle of sequence stratigraphy, by sequence cycle standard, subsequence set interface location is determined, Assay surface feature, including rock core, extinct plants and animal, element, mineral constituent, the feature logged well in terms of these.
In step 4, the sensitiveness according to gamma ray curve to mud shale, analyze subsequence set and sequence interface from Right gamma curve feature, the corresponding relation established between gamma ray curve and subsequence set and sequence interface, according to this correspondence Relation, with reference to features of logging curve, sequence dividing is carried out to other emphasis wells, establishes work area Stratigraphic framework section.
In steps of 5, the gamma ray curve feature according to corresponding to subsequence set and sequence interface, with carrying out whole district's sequence Layer division, under the Stratigraphic framework profile control that works, SEQUENCE STRATIGRAPHIC distribution plane figure is drawn, analyzes sequence distribution of strata rule.
Element, GR spectroscopies division mud page under the control of mud shale SEQUENCE STRATIGRAPHIC DIVISION method in the present invention, the i.e. origin cause of formation Rock stratum sequence, abbreviation EGRP methods, for the method for dividing mud shale SEQUENCE STRATIGRAPHIC by element and evolution of sedimentary environment and GR curves. In the forming process of fine-grained sediment sequence, influenceed by effects such as weathering, carrying and dilutions, often showed at sequence interface For features such as weather relative humidity, more material resources.According to these features, EGRP sequence dividings, first according to Maturation feature, knot Close the variation characteristic identification sequence interface and subsequence set of environmental evolution and petrofabric;Further according to natural gamma (GR) curve pair The sensitiveness of mud shale, itself and subsequence set and the corresponding relation of sequence interface are established, carry out sequence extrapolation.Mud in the present invention Shale SEQUENCE STRATIGRAPHIC DIVISION method, element and the variation characteristic of environmental evolution feature and petrofabric is made full use of to identify sequence circle Face and subsequence set, the sensitiveness then deposited according to natural gamma (GR) curve to mud shale, establish its with subsequence set and The corresponding relation of sequence interface, whole district's SEQUENCE STRATIGRAPHIC contrast is carried out, and then analyze sequence distribution of strata rule.EGRP mud shale layers Sequence STRATIGRAPHIC DIVISION method not only improves the identification of sequence interface, is advantageous to the extrapolation of sequence again, solves current mud shale particulate Sequence interface identification and the SEQUENCE STRATIGRAPHIC whole district contrast two problems in depositional sequence STRATIGRAPHIC DIVISION, have filled up domestic mud shale particulate Blank in depositional sequence STRATIGRAPHIC DIVISION, whole method is workable, can be mud shale fine-grained sediment stratum spread and The research of evolved stages rule, shale Hydrocarbon Enrichment Regularity etc. provides effective technical method, is the exploration deployment of shale oil gas Effective technical support is provided.
Compared to prior art, the invention has the advantages that:The present invention can solve the problem that during producing scientific research Practical problem, basis is provided for follow-up geological research, there is practical significance;In addition because of the SEQUENCE STRATIGRAPHIC in current mud shale Fine division and contrast are a problems, without relatively effective technology and means, therefore also have important scientific value.
Brief description of the drawings
Fig. 1 is the flow chart of a specific embodiment of the mud shale SEQUENCE STRATIGRAPHIC DIVISION method of the present invention;
Fig. 2 is typical well EGRP SEQUENCE STRATIGRAPHIC DIVISION figures in a specific embodiment of the invention;
Fig. 3 is sequence stratigraphic framework figure of the invention in a specific embodiment of the invention;
Fig. 4 is subsequence set formation thickness isogram of the present invention in a specific embodiment of the invention.
Embodiment
For enable the present invention above and other objects, features and advantages become apparent, it is cited below particularly go out preferable implementation Example, and coordinate shown in accompanying drawing, it is described in detail below.
As shown in figure 1, Fig. 1 is the flow chart of mud shale EGRP SEQUENCE STRATIGRAPHIC DIVISION methods in one embodiment of the invention.
In step 101, several mouthfuls of wells are bored in work area, rock core sample is extracted from every mouthful of well, rock core is obtained by core observation Architectural feature (lamellar, stratiform and bulk);By analytical test, element data and rock constituents data are obtained.Flow enters To step 102.
In step 102, because element can reflect the change of depositional environment, therefore according to Ca, Mg, Fe, Mn, Th, Sr etc. The environmental evolution feature such as the feature of element, analysis geologic climate, paleao-water depth, paleosalinity and ancient redox.Flow enters step 103。
In step 103, based on principle of sequence stratigraphy, by sequence cycle standard, subsequence set interface location is determined, Assay surface feature, including rock core, extinct plants and animal, element, mineral constituent, the feature of log well etc..Flow enters step 104.
In step 104, the sensitiveness according to natural gamma (GR) curve to mud shale, subsequence set and sequence interface are analyzed GR curvilinear characteristics, the corresponding relation established between GR curves and subsequence set and sequence interface, according to this corresponding relation, with reference to The features of logging curve such as R25, sequence dividing is carried out to other emphasis wells, establishes work area Stratigraphic framework section.Flow enters step Rapid 105.
In step 105, according to gamma ray curve feature corresponding to subsequence set and sequence interface, with carrying out whole district's sequence Layer division, under the Stratigraphic framework profile control that works, SEQUENCE STRATIGRAPHIC distribution plane figure is drawn, analyzes sequence distribution of strata rule.
In the specific embodiment of the application present invention, as shown in Fig. 2 South Bohai depression typical case's well EGRP for Jiyang depression SEQUENCE STRATIGRAPHIC DIVISION, according to high Ti, Fe, Al, Na, K constant element and Co, Mn trace element, low carbon acid rock salt content, Ca elements Feature, sand three under sub- section be divided into four fourth level sequences.
In Fig. 3 sequence stratigraphic framework figures, according to typical well sequence dividing, sequence feature pass corresponding with GR curves is established System, so as to which the sequence of core hole and the log data of non-core hole be connected, establish SEQUENCE STRATIGRAPHIC section.
It is right according to the sequence feature of foundation and the corresponding relation of GR curves in Fig. 4 subsequence set formation thickness distribution maps The well of whole district's plane control carries out EGRP sequence dividings, draws subsequence set formation thickness isogram, is put down for analyzing stratum EDS maps rule.
The technical method of the present invention, including the identification of EGRP sequence interfaces, chronostratigraphic architecture are established, SEQUENCE STRATIGRAPHIC distribution rule Rule analysis.Wherein described EGRP sequence interfaces are the deposition interfaces between sequence and sequence, are to have on the lake levels such as water source injection The event of liter is formed, and is the basis for dividing sequence.In general, sequence interface it is upper and lower exist relatively obvious element, extinct plants and animal, The change of deposition, well logging and seismic response etc..Sequence stratigraphic framework be widely used in bed succession all kinds of stratum or The regional space-time ordered arrangement pattern of lithologic unit, embodiment is that deposition and sedimentary formation are advised in the spread of three dimensions Rule.Sequence stratigraphic framework is to be widely used in the regional space-time ordered arrangement type of all kinds of stratum or lithologic unit in bed succession Formula, embodiment is the Distribution Pattern of deposition and sedimentary formation in three dimensions.The SEQUENCE STRATIGRAPHIC regularity of distribution is with referring to sequence After layer screen work is established, the SEQUENCE STRATIGRAPHIC DIVISION of other wells on spreading area, the formation thickness plane of the subsequence set of the whole district is drawn Figure, carry out the analysis of plane rule.
The preferred embodiments of the present invention are the foregoing is only, are not used to limit the scope of the claims of the present invention, other use this hair The equivalence changes of bright patent spirit, it all should all belong to the scope of the claims of the present invention.

Claims (6)

1. mud shale SEQUENCE STRATIGRAPHIC DIVISION method, it is characterised in that the mud shale SEQUENCE STRATIGRAPHIC DIVISION method includes:
Step 1, extract rock core sample and obtain element data and feature of fabric;
Step 2, according to the feature of element, analysis geologic climate, paleao-water depth, paleosalinity, ancient redox these environmental evolution features;
Step 3, sequence cycle standard is pressed with principle of sequence stratigraphy, determines subsequence set interface feature;
Step 4, the corresponding relation established between gamma ray curve and subsequence set and sequence interface, Stratigraphic framework section is established;
Step 5, whole district's SEQUENCE STRATIGRAPHIC DIVISION is carried out, draws SEQUENCE STRATIGRAPHIC distribution plane figure, analyzes sequence distribution of strata rule.
2. mud shale SEQUENCE STRATIGRAPHIC DIVISION method according to claim 1, it is characterised in that in step 1, in work area Several mouthfuls of wells are bored, rock core sample is extracted from every mouthful of well, the architectural feature of rock core, including lamellar, stratiform is obtained by core observation And bulk;By analytical test, element data and rock constituents data are obtained.
3. mud shale SEQUENCE STRATIGRAPHIC DIVISION method according to claim 1, it is characterised in that in step 2, according to Ca, The feature of these elements of Mg, Fe, Mn, Th, Sr, analysis geologic climate, paleao-water depth, paleosalinity and ancient redox these environmental evolutions Feature.
4. mud shale SEQUENCE STRATIGRAPHIC DIVISION method according to claim 1, it is characterised in that in step 3, with sequence Based on layer learns principle, by sequence cycle standard, subsequence set interface location, assay surface feature, including rock core, Gu Sheng are determined Thing, element, mineral constituent, the feature logged well in terms of these.
5. mud shale SEQUENCE STRATIGRAPHIC DIVISION method according to claim 1, it is characterised in that in step 4, according to nature Gamma curve analyzes the gamma ray curve feature of subsequence set and sequence interface, establishes nature gal to the sensitiveness of mud shale Corresponding relation between horse curve and subsequence set and sequence interface, according to this corresponding relation, with reference to features of logging curve, to it Its emphasis well carries out sequence dividing, establishes work area Stratigraphic framework section.
6. mud shale SEQUENCE STRATIGRAPHIC DIVISION method according to claim 1, it is characterised in that in steps of 5, according to quasi- layer Gamma ray curve feature corresponding to sequence group and sequence interface, whole district's SEQUENCE STRATIGRAPHIC DIVISION is carried out, in work Stratigraphic framework section Under control, SEQUENCE STRATIGRAPHIC distribution plane figure is drawn, analyzes sequence distribution of strata rule.
CN201610442252.9A 2016-06-17 2016-06-17 Mud shale SEQUENCE STRATIGRAPHIC DIVISION method Withdrawn CN107515957A (en)

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CN109025981A (en) * 2018-06-22 2018-12-18 中国石油天然气股份有限公司 Accumulate correlation of sand bodies method and system in meandering stream side
CN110647650A (en) * 2019-09-29 2020-01-03 北京师范大学 Method and system for identifying sea lake environment of offshore basin
CN110714745A (en) * 2019-10-17 2020-01-21 中国石油集团长城钻探工程有限公司 Shale gas horizontal well fracturing staged optimization method
CN111379552A (en) * 2020-03-04 2020-07-07 中国石油化工股份有限公司 Sea-phase shale gas horizontal well target window selection method based on high-frequency sequence stratigraphy
CN111381277A (en) * 2018-12-27 2020-07-07 中国石油天然气股份有限公司 Method and device for establishing carbonate rock isochronous stratum framework
CN112730808A (en) * 2020-12-28 2021-04-30 长江大学 Method for determining number of continental lake basin sea invasion action periods under non-dense sampling condition
CN112763567A (en) * 2020-12-30 2021-05-07 核工业北京地质研究院 Element geochemical method suitable for variegated stratum division
CN113047831A (en) * 2021-05-12 2021-06-29 西南石油大学 Shale sequence dividing method

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109025981A (en) * 2018-06-22 2018-12-18 中国石油天然气股份有限公司 Accumulate correlation of sand bodies method and system in meandering stream side
CN111381277A (en) * 2018-12-27 2020-07-07 中国石油天然气股份有限公司 Method and device for establishing carbonate rock isochronous stratum framework
CN110647650A (en) * 2019-09-29 2020-01-03 北京师范大学 Method and system for identifying sea lake environment of offshore basin
CN110647650B (en) * 2019-09-29 2022-04-05 北京师范大学 Method and system for identifying sea lake environment of offshore basin
CN110714745A (en) * 2019-10-17 2020-01-21 中国石油集团长城钻探工程有限公司 Shale gas horizontal well fracturing staged optimization method
CN111379552A (en) * 2020-03-04 2020-07-07 中国石油化工股份有限公司 Sea-phase shale gas horizontal well target window selection method based on high-frequency sequence stratigraphy
CN112730808A (en) * 2020-12-28 2021-04-30 长江大学 Method for determining number of continental lake basin sea invasion action periods under non-dense sampling condition
CN112730808B (en) * 2020-12-28 2023-04-07 长江大学 Method for determining number of continental lake basin sea invasion action periods under non-dense sampling condition
CN112763567A (en) * 2020-12-30 2021-05-07 核工业北京地质研究院 Element geochemical method suitable for variegated stratum division
CN112763567B (en) * 2020-12-30 2023-11-14 核工业北京地质研究院 Element geochemistry method suitable for variegated stratum division
CN113047831A (en) * 2021-05-12 2021-06-29 西南石油大学 Shale sequence dividing method
CN113047831B (en) * 2021-05-12 2022-07-15 西南石油大学 Shale sequence dividing method

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Application publication date: 20171226