Superimposed basinoil gaspool-forming periodrock porosity recovering method

A technology of rock porosity and superimposed basins, applied in the field of oil and gas geological exploration, can solve the problems of heavy workload, difficult restoration of ancient porosity, and large distribution range, and achieve the effect of wide application
CN109324345AActive Publication Date: 2019-02-12CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2019-02-12

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Abstract

The invention provides a superimposed basin oil gas pool-forming period rock porosity recovering method. The superimposed basin oil gas pool-forming period rock porosity recovering method comprises the steps that Step 1, recovery of stratum denudation quantity is carried out; Step 2, a thermal evolution history model is established; Step 3, pool-forming periods of target layer oil gas in an area and stratus temperatures of all the pool-forming periods are determined; Step 4, a compaction porosity model in the process of burying is established; Step 5, a surface-porosity-porosity model is established; Step 6, an organic acid corrosion porosity model in the process of burying is established; and Step 7, according to the compaction porosity model in the Step 4 and the organic acid corrosion porosity model established in the Step 6, a pool-forming period porosity model is established. The superimposed basin oil gas pool-forming period rock porosity recovering method enriches a quantitativeevaluation of corrosion porosity in the processes of multi-period pool-forming, can be widely applied to an evaluation of porosity in the process of superimposed basin multi-period pool-forming, andhas important guiding significancesfor oil gas exploration.
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Description

technical field

[0001] The invention relates to the technical field of oil and gas geological exploration, in particular to a method for restoring rock porosity during the oil and gas accumulation period in superimposed basins. Background technique

[0002] Low-permeability oil and gas resources occupy a very important position in my country's oil and gas resources, and are also the main targets of future oil and gas exploration in China. The formation of low-permeability reservoirs is mainly affected by sedimentation and later diagenesis. Sedimentation mainly controls the physical properties of reservoirs, while compaction and cementation in diagenesis can damage the physical properties of reservoirs, and dissolution can improve reservoir properties. Layer properties. Most of the existing reservoir evaluation systems are static evaluations, and the reservoir physical properties in the critical accumulation period that really determine whether oil and gas enter the reservoi...

Claims

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