Carbonate rock gas reservoir interpretation method and device
A carbonate rock and gas layer technology, which is used in earth-moving drilling, special data processing applications, wellbore/well components, etc., and can solve problems such as inaccurate calculation of porosity and lithological components
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Embodiment 1
[0056] The interpretation method of the carbonate rock gas layer in this embodiment, such as Figure 1 to Figure 3 shown, including the following steps:
[0057] 1) Using the lithology description of the core analysis, the gas layer cores are divided into six lithologic types: limestone, dolomitic limestone, dolomitic limestone, limy dolomite, gray dolomite, and dolomite. The control of diagenesis and tectonic action, the lithology types of carbonate gas layers in different gas reservoirs can contain one or more of the six lithology types, and the lithology components in the six lithology types of gas layers In addition to shale, it also contains one or both of the two lithological components of dolomite and limestone, using the porosity and density logging values of core analysis to establish the porosity logging interpretation of different lithological types of gas reservoirs Model:
[0058] The first and second members of the Feixianguan Formation in the Puguang Gas Fie...
Embodiment 2
[0080] The interpretation method of the carbonate gas layer in this example, the specific implementation steps are the same as in Example 1. Due to the common control of sedimentation, diagenesis, and tectonic processes, a set of weathered karst reservoirs developed at the top of the Maokou Formation in the Puguang Gas Field. The lithology of the formation in this section is mainly limestone and dolomitic limestone, while the gas layer develops in the dolomitic strata, which is not a reservoir, and the lithological composition of dolomitic limestone is mudstone, dolomite and Therefore, a porosity logging interpretation model was established in the dolomitic limestone gas layers of the Maokou Formation in the Puguang Gas Field. The analysis of the core analysis data of 198 core samples from the gas layers of 3 coring wells in the Maokou Formation showed that , because the density log curve is the only one in the Feimaokou Formation in the Puguang Gas Field that can accurately re...
Embodiment 3
[0084] The interpretation method of the carbonate gas layer in this example, the specific implementation steps are the same as in Example 1. Due to the joint control of sedimentation, diagenesis, and tectonic processes, a set of intra-platform development was developed in the Feisan Member of the Feixianguan Formation in the Puguang Gas Field. The lithology of this section is mainly limestone, dolomitic limestone, limey dolomite, dolomitic limestone and gray dolomite, while the gas layer develops in the gray dolomite strata, limestone, Dolomite, limestone dolomite, and dolomitic limestone strata are non-reservoir formations, and the lithological components of gray dolomite are mudstone, dolomite and limestone. A porosity log interpretation model was established in the gas layer, and the analysis of 225 core samples from 5 coring wells in the gas layer of the third member of the Feixianguan Formation showed that the density log curve in the Puguang gas field The only logging cu...
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