威远地区筇竹寺组选区评价标准及有利勘探区预测  

Evaluation Criterion and Favorable Exploration Block Forecast in Qiongzhusi Formation of Weiyuan Area

作　　者：任东超 王晓飞[2] 刘冬冬[2] 宋达林 何身焱 梁强 张帅 

机构地区：[1]中化地质矿山总局山东地质勘查院,山东济南250013 [2]成都理工大学能源学院,四川成都610059 [3]中石化石油工程设计有限公司,山东东营257000

出　　处：《非常规油气》2017年第5期38-43,共6页Unconventional Oil & Gas

基　　金：国家科技重大专项"南方海相页岩气开采试验"(2011ZX05018-006-07)资助

摘　　要：为确定威远地区筇竹寺组页岩气的富集地质条件及选区评价标准,对筇竹寺组黑色页岩露头及岩心样品进行研究,分析其沉积及有机地球化学特征,总结出页岩气选区评价标准,并优选出有利勘探区。结果表明:研究区筇竹寺组页岩沉积稳定,单层厚度较大,为250~350m;有机碳含量高,平均为2.15%,成熟度较高,达到过成熟阶段;有机质类型以Ⅰ型为主,Ⅱ1型为辅;页岩中石英、长石等脆性矿物含量较高,有利于页岩的压裂开发。综合分析页岩气成藏地质条件,总结出页岩气选区评价标准,研究区达到评价标准中的Ⅱ级标准,具有商业开发价值。采用信息叠合法初选出面积约为1500km2的页岩气有利勘探区。According to the measured profile of dark shale and the laboratory test results of rock samples, this paper has studied the characteristics of shale gas forming conditions to reveal the evaluation criteria for shale gas and the favorable exploration area of Lower Cambrian Qiongzhusi formation of Weiyuan area. Results showed that the shale stability of Qiongzhusi formation in study area is stable, and the thickness of the single layer is 250-350 m. Organic matter abundance of shale is high, the average is 2.15%, and the maturity is also higher, reaching high mature stage. The organic matter types of shale is given priority to type I , and the brittle content of minerals in shale is high, dominated by quartz and feldspar, which is in favor of the shale fracture development. The geological conditions of shale gas accumulation are comprehensively analyzed, then has summarized the criteria for evaluating shale gas selection. According to the criteria and study area met the secondary standard, showing that the study area had good potential of shale gas resources. Information superposition method was adopted and the area that about 1500 km^2 was initially selected as favorable area for shale gas exploration.

关 键 词：威远地区 筇竹寺组 页岩气 评价标准 有利探区 

分 类 号：P618.13[天文地球—矿床学]