Quantitative lithogenous phase evaluation method for compact sandstone reservoir

A technique for quantitative evaluation of tight sandstone reservoirs, applied in the direction of material inspection products, soil material testing, etc., can solve the problems of low evaluation accuracy, less coring data, unclear understanding of the distribution of diagenetic facies belts, etc., and reduce the cost of exploration and development. cost effect

Active Publication Date: 2015-02-18
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method suitable for diagenetic facies evaluation in the existing sandstone reservoir diagenetic facies evaluation method due to the lack of coring

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  • Quantitative lithogenous phase evaluation method for compact sandstone reservoir
  • Quantitative lithogenous phase evaluation method for compact sandstone reservoir
  • Quantitative lithogenous phase evaluation method for compact sandstone reservoir

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Embodiment Construction

[0035] The sandstone porosity of the Xujiahe Formation in the Puguang Gas Field in China is 0.14-7.84%, with an average of 2.14%, and the permeability is 0.004-7.86×10 -3 μm 2 , with an average of 0.089×10 -3 μm 2 , its reservoirs belong to tight sandstone reservoirs; below in conjunction with the examples and accompanying drawings of quantitative evaluation of diagenetic facies of Xujiahe Formation tight sandstone reservoirs in Puguang Gas Field, the embodiment of the present invention will be further described in detail, by figure 1 As can be seen, the concrete steps of the present invention are as follows:

[0036] 1. Collection of Xujiahe Formation core data and well logging data in Puguang Gas Field

[0037] 1.1 The core data include core observation data of 250 m from 4 coring wells of Well Pulu 1, Well Puguang 3011-5, Well Reinjection 1, and Well Pulu 2, and laboratory analysis data of 1100 sampling points, including rock thin sections , Cast thin section, scanning ...

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Abstract

The invention relates to a quantitative lithogenous phase evaluation method for a compact sandstone reservoir, and belongs to the technical field of oil and gas reservoir evaluation. Under a condition of little coring information of a region to be evaluated, the types of lithogenous phases of the compact sandstone reservoir in the region to be evaluated are classified according to core information of the region to be evaluated and logging information, and a relation between the types of the lithogenous phases of the compact sandstone reservoir in the region to be evaluated and logging parameters of a coring well is constructed, so that the types of the lithogenous phases of the compact sandstone reservoir in the region to be evaluated and the types of the lithogenous phases of a non-coring well are determined, quantitative evaluation on the lithogenous phases of the compact sandstone reservoir in the region to be evaluated is realized, and distribution features of favorable lithogenous phase zones and favorable reservoirs of the compact sandstone reservoir are determined; a reliable basis is provided for forecasting a favorable exploration and development zone and instructing oil-gas exploration and development, and the exploration and development cost is lowered.

Description

technical field [0001] The invention relates to a quantitative evaluation method for diagenetic facies of tight sandstone reservoirs, belonging to the technical field of evaluation of oil and gas reservoirs. Background technique [0002] The tight sandstone has undergone a complex and intense diagenetic evolution process, and the reservoir lithology is tight and poor in physical properties, with an average porosity of about 2.5% and an average permeability of 0.05×10 -3 μm 2 In addition, tight sandstone reservoirs have many types of diagenesis and large differences in intensity, which makes it difficult to divide, identify and evaluate diagenetic facies, and it is difficult to recognize the distribution of favorable reservoirs. [0003] The existing evaluation method of diagenetic facies in sandstone reservoirs is to classify diagenetic facies types by determining the type and strength of diagenesis through core observation, microscopic thin section, scanning electron micro...

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Application Information

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IPC IPC(8): G01N33/24
Inventor 莫建武曾正清谭国华高鹏周凯李元亮胡明姣王世坤常飞
Owner CHINA PETROLEUM & CHEM CORP
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