石油钻采工艺2018，Vol.40Issue(1)：81-88,8.DOI:10.13639/j.odpt.2018.01.013
多层次模糊评价模型在低煤阶煤层气区块优选中的应用——以澳大利亚东部A区块为例
Application of multi-level fuzzy evaluation model to the selection of favorable block for low rank CBM: a case study on Block A in eastern Australia
摘要
Abstract
Compared with middle and high rank CBM, low rank CBM is more advantageous with low coalification of coal rocks, low gas content, high ash content and good reservoir physical properties. The selection of low rank CBM blocks is of great significance to decrease CBM development cost and promote the development of CBM industry. The low rank CBM block in eastern Australia was taken as the study object. According to the multi-level fuzzy mathematical thinking, combined with the characteristics of low rank CBM in this block, cumulative thickness, gas content, ash content, recoverable reserves, porosity, permeability, gas saturation, critical desorp-tion ratio and original formation pressure are selected as the evaluation indexes to establish the multi-level fuzzy model for evaluating the development results of low rank CBM. Then, based on the weight coefficient of evaluation index and the 3D geologic model of this block, development result evaluation parameters of low rank CBM are constituted. The thresholds of development result evaluation parameters of this block are determined as 0.507 and 0.317 by taking the average daily gas production in the stable period of 30×103 m3and 6×103m3as the yardstick, and accordingly the favorable development areas in the this block were determined. Thus, multi-level fuzzy evaluation model is successfully applied to the selection of favorable development areas in low rank CBM blocks. In the actual application, the single-well gas production of developed wells in high, middle and low yield zones are highly accordance with the selec-tion results. And it is indicated that multi-level fuzzy evaluation plays a guiding role in selecting the favorable blocks of low rank CBM.关键词
低煤阶煤层气/有利区划分/开发区块优选/多层次模糊模型/三维地质模型/澳大利亚Key words
lowrank CBM/favorable area/favorable blocks selecting/multi-level fuzzy model/3D geologic model/Australia分类
能源科技引用本文复制引用
淮银超,陈西西,邹威,谭玉涵..多层次模糊评价模型在低煤阶煤层气区块优选中的应用——以澳大利亚东部A区块为例[J].石油钻采工艺,2018,40(1):81-88,8.基金项目
青年科学基金项目"未固结砂岩中的井孔声波传播特征研究"(编号:41504090) （编号:41504090）
中央高校基金基础研究项目"页岩气储层测井评价方法研究"(编号:310826161021)、"疏松砂岩储层中的井中声波数值模拟"(编号:310826161014). （编号:310826161021）
