CAJ | 학술논문

提通过采用岩心观察、扫描电镜、地化参数分析等实验方法，研究了四川盆地川西北地区页岩的沉积相、厚度及分布、有机质类型及含量、成熟度、生烃史等页岩气成藏条件。川西北地区侏罗系自流井组大安寨段发育潮坪、沼泽及泻湖相，富有机质黑色泥页岩为主、单层厚度大，有机碳平均质量分数为2.0%，有机质类型以Ⅱ1、Ⅱ2、型为主的混合型，生烃潜力较大，热演化程度高，具备页岩气藏发育的良好地质条件。根据页岩气富集的多种因素分析，认为元坝-仪龙南部、达州-宣汉地区页岩气聚集条件较优越，是四川盆地川西北地区自流井组大安寨段页岩气勘探开发的有利区域。
제통과채용암심관찰、소묘전경、지화삼수분석등실험방법，연구료사천분지천서북지구혈암적침적상、후도급분포、유궤질류형급함량、성숙도、생경사등혈암기성장조건。천서북지구주라계자류정조대안채단발육조평、소택급사호상，부유궤질흑색니혈암위주、단층후도대，유궤탄평균질량분수위2.0%，유궤질류형이Ⅱ1、Ⅱ2、형위주적혼합형，생경잠력교대，열연화정도고，구비혈암기장발육적량호지질조건。근거혈암기부집적다충인소분석，인위원패-의룡남부、체주-선한지구혈암기취집조건교우월，시사천분지천서북지구자류정조대안채단혈암기감탐개발적유리구역。
Based on core observation, scanning electron microscope and analysis of geochemical parameters, the authors studied the reservoir-forming conditions such as sedimentary faces, thickness and distribution, organic types and content, maturity and hydrocarbon generation history of the shale in the northwest of Sichuan Basin. Compared with the gas-producing shale in the USA, the study area has developed tidal flat, swamp and lagoon facies, lithology is mainly characterized by shale mud with rich organic matter and large thickness in a single formation, TOC is 2.0% and organic matter is mainly of Ⅲ type with great hydrocarbon generation potential and high thermal evolution. All these factors are favorable for the formation of shale gas reservoir. An analysis of many factors of shale gas accumulation show that Yuanba-southern Yilong and Dazhou-Xuanhan areas have good accumulation conditions for shale gas, and hence are favorable areas for shale gas exploration and development in Daanzhai Member of Jurassic Ziliujing Formation in the northwest of Sichuan Basin.