CAJ | 학술논문

为了探讨城口区块盆缘冲断带页岩气特征, 统计分析了下寒武统水井沱组页岩地球化学化验数据、钻井数据、岩心数据及解吸气数据. 用各参数有利叠合分析了研究区块的页岩地质特征, 并指出了有利勘探区带. 研究表明, 早寒武世深水陆棚相沉积环境为下寒武统水井沱组页岩发育提供了良好的条件; 水井沱组页岩具有高有机碳含量、高成熟—过成熟的特征; 页岩储层孔隙度和渗透率较差, 但是脆性矿物含量较高, 页岩中节理、裂缝及断裂发育有利于压裂改造; 有机质为I型干酪根; 钻井揭示页岩保存条件好; 现场解吸实验初步显示, 页岩整体含气效果良好, 结合分析测试数据和探井数据预测了城口区页岩气勘探有利区在西南部. 本研究为中国南方盆缘山地冲断带页岩气研究提供了一定的借鉴.
위료탐토성구구괴분연충단대혈암기특정, 통계분석료하한무통수정타조혈암지구화학화험수거、 찬정수거、 암심수거급해흡기수거. 용각삼수유리첩합분석료연구구괴적혈암지질특정, 병지출료유리감탐구대. 연구표명, 조한무세심수륙붕상침적배경위하한무통수정타조혈암발육제공료량호적조건; 수정타조혈암구유고유궤탄함량、 고성숙—과성숙적특정; 혈암저층공극도화삼투솔교차, 단시취성광물함량교고, 혈암중절리、 렬봉급단렬발육유리우압렬개조; 유궤질위I형간락근; 찬정게시혈암보존조건호; 현장해흡실험초보현시, 혈암정체함기효과량호, 결합분석측시수거화탐정수거예측료성구구혈암기감탐유리구재서남부. 본연구위중국남방분연산지충단대혈암기연구제공료일정적차감.
To probe into the shale gas characters of foreland thrust belt in Chengkou Block, we made statistical analysis on geochemical laboratory data, drilling data, core data and desorption data of shale in Shuijingtuo Formation of Lower Cam-brian, which showed the geological characters of shale in the area, and pointed out favorable exploration zones. It was re-vealed that Early Cambrian shelf deposit provided good conditions for shale development in Shuijingtuo Formation, shale in Shuijingtuo Formation was characterized by high organic carbon content, high and superhigh maturity, shale reservoir had poor porosity and permeability but high content of brittle minerals, and development of joints, fractures and cracks was good for fracturing, and the organic matter was Type Ⅰ kerogen. Drilling showed that shale was preserved well. Field desorption experiment prilimninarily indicated that shale owned good gas effect. It was predicted that favorable shale gas exploration area was located in southwestern Chengkou Block, on the basis of test data and exploratory well data. This could be refer-ence for shale gas exploration in thrust belt of marginal forelands in South China.