Quantitative interpretation and evaluation method for gas content of rock in unit volume

Abstract

The invention discloses a quantitative interpretation and evaluation method for the gas content of a rock in unit volume. The quantitative interpretation and evaluation method for the gas content of the rock in unit volume comprises the following specific steps that various logging parameters, gas logging parameters and while-drilling engineering parameters are acquired through real-time acquisition, processing, storage, recording and calculation by a Dumout project comprehensive mud logging instrument and a gas logging analyzer; the degassing efficiency of a degasser is obtained through while-drilling experiments on the operation site; and the gas content of the rock in unit volume in an objective interval of a well is calculated and studied through reading a gas compression factor chartand combining with the corresponding engineering parameters. By integrating fluid conclusions of reservoirs of drilled wells with different oil and layer groups, a quantitative interpretation and evaluation criterion of the gas content of the rock in unit volume is obtained through statistical summary. The quantitative interpretation and evaluation method for the gas content of the rock in unit volume is a fluid quantitative interpretation and evaluation criterion of new parameters, and is a comprehensive interpretation and evaluation method which can accurately determine reservoir fluid properties.

Description

technical field [0001] The invention relates to a method for quantitatively interpreting and evaluating the gas content of rock per unit volume, which is suitable for the field of petroleum geological exploration, especially for industries such as mud logging and drilling. Background technique [0002] Mud logging technology is the most basic technology in the process of oil and gas exploration and development, and it is one of the most timely and direct means to discover oil and gas reservoirs and correctly evaluate oil and gas reservoirs. With the advancement of drilling technology and the increase of reservoir types, the complexity of oil and gas exploration has increased, and the interpretation and evaluation of oil and gas layers has become more and more difficult. How to quickly, accurately and reasonably interpret and evaluate oil and gas layers is the key to the development of mud logging technology. At present, the interpretation and evaluation technology for oil an...

AI Technical Summary

Problems solved by technology

At present, the interpretation and evaluation technology for oil and gas layers is still in the qualitative stage, and quantitative judgments cannot be made, and there are still some errors in the oil-bearing evaluation of formations

Images