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Partition method for clasolite reservoir lithogenous phases

A clastic rock and reservoir technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of unfavorable diagenetic facies fine research and different division methods, and achieve wide applicability and wide applicability , good quantitative effect

Active Publication Date: 2018-05-29
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the division scheme of diagenetic facies is general, and the division methods are different, which is not conducive to the fine study of diagenetic facies

Method used

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  • Partition method for clasolite reservoir lithogenous phases
  • Partition method for clasolite reservoir lithogenous phases
  • Partition method for clasolite reservoir lithogenous phases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] The method for dividing diagenetic facies of clastic rock reservoirs includes the following steps:

[0083] 1) According to the size of the compaction rate Com, the compaction of clastic rock A i Strong compaction A 1 , medium compaction A 2 and weakly compacted A 3 ;

[0084] Among them, strong compaction A 1 The compaction rate Com ∈ (66, 100];

[0085] Medium compaction A 2 The compaction rate Com ∈ [34, 66];

[0086] Weak compaction A 3 The compaction rate Com ∈ [0, 34];

[0087] 2) According to the size of the cementation rate Cem, the cementation of clastic rocks B i Strongly cemented B 1 , medium cement B 2 and weakly cemented B 3 ;

[0088] Among them, the cementation rate of strong cementation Cem∈(66, 100],

[0089] The cementation rate Cem∈[34,66] of medium cementation,

[0090] Cementation rate Cem∈[0,34) of weak cementation;

[0091] 3) According to the magnitude of the dissolution rate Dis, the dissolution of clastic rocks C i strong corro...

Embodiment 2

[0152] According to the analysis and test data of D1 rock samples of the East Member of Dongying Formation in the Bozhong Sag, the D1 diagenetic facies of the East Member is classified. The reservoir diagenetic facies division method is as follows:

[0153] 1. The collected rock sample data include the following:

[0154]

[0155] 2. Calculate the compaction rate Com, cementation rate Cem and dissolution rate Dis

[0156] (1) According to the above rock sample data and formulas for calculating compaction rate, cementation rate, and dissolution rate: obtain the compaction rate, cementation rate, and dissolution rate of D1 of the first section of the East and D2 of the second section of the East;

[0157] The formula for calculating the compaction rate is:

[0158] Com=(V 1 -V 2 -V 3 ) / (V 1 -V 2 -V 3 +V 4 +V 5 )

[0159] In the formula, Com is the compaction rate, %; V 1 (Original pore volume ratio in Dongying Formation in Bozhong Sag) is 42%; V 2 (The volume rat...

Embodiment 3

[0171] According to the analysis and testing data of D2 rock samples of the Dongying Formation in the Bozhong Sag, the D2 diagenetic facies of the Dongying Formation were classified. The reservoir diagenetic facies division method is as follows:

[0172] 1. The collected rock sample data include the following:

[0173]

[0174] 2. Calculate the compaction rate Com, cementation rate Cem and dissolution rate Dis

[0175] (1) Calculate the compaction rate, cementation rate, and dissolution rate formula according to the above-mentioned rock sample data and embodiment 1: obtain the D2 compaction rate, cementation rate, and dissolution rate of the second section of the East;

[0176]

[0177] (2) According to the calculation method of embodiment 1,

[0178] It is determined that the D2 diagenetic facies is: medium compaction-calcite-quartz-clay weak cementation-feldspar-calcite weak dissolution diagenetic facies.

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Abstract

The invention discloses a partition method for clasolite reservoir lithogenous phases. The method comprises the steps that firstly, with the combination of the magnitudes of a compaction rate Com, a cementing rate Cem and a dissolution rate Dis, the clasolite lithogenous phases Dn are divided into nine types, the total compaction rate of rock samples, the cementing rate of each cementing mineral and the dissolution rate of each dissolution mineral are calculated, and the total cementing rate and the total dissolution rate of the rock samples are obtained through calculation; then, the total compaction rate, the total cementing rate and the total dissolution rate of the rock samples are compared with the compaction rates, the cementing rates and the dissolution rates corresponding to the nine lithogenous phase types; it is determined that the lithogenous phase name of the rock samples is Ai+J-Bi+R-Ci. The method has the advantages of being easy to implement, reliable in theory and goodin quantitative feature.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for dividing diagenetic facies of clastic rock reservoirs. Background technique [0002] Diagenetic facies refers to the geological body formed by various diagenesis under the control of diagenetic environment and has a certain geometric shape, specific diagenetic fabric and specific diagenetic mineral combination. Similar to the concept of facies in sedimentary facies and logging facies, the meaning reflected by diagenetic facies is the collection of the final state of a reservoir under the joint action of multiple factors such as structure, fluid, temperature, and pressure, and it is the petrological feature in the diagenetic environment. The sum of geochemical characteristics and petrophysical characteristics, the core content of which is the current mineral composition and fabric appearance, which is mainly a genetic mark that characte...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q50/02
CPCG06Q50/02G06F30/20
Inventor 钱文蹈尹太举张昌民侯国伟何苗夏敏
Owner YANGTZE UNIVERSITY
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