CAJ | 학술논문

延川南山西组含煤岩系发育于三角洲平原亚相，其煤相类型主要为潮湿森林沼泽相，是延川南煤层气田的主要产气层段。以岩心、测井资料、煤岩分析数据为基础，依据成煤物质的形成条件及保存环境，将煤相进一步细分为高位森林泥炭沼泽、中位森林泥炭沼泽及低位森林泥炭沼泽三种微相类型；并在此基础上，探讨煤岩微相与煤层厚度、夹矸厚度、煤岩含气量、煤岩物性及围岩封存性能的关系，揭示煤层气的高产富集规律。研究结果表明中位森林泥炭沼泽微相区最有利于煤层气开发，其次为低位森林泥炭沼泽微相区。
연천남산서조함매암계발육우삼각주평원아상，기매상류형주요위조습삼림소택상，시연천남매층기전적주요산기층단。이암심、측정자료、매암분석수거위기출，의거성매물질적형성조건급보존배경，장매상진일보세분위고위삼림니탄소택、중위삼림니탄소택급저위삼림니탄소택삼충미상류형；병재차기출상，탐토매암미상여매층후도、협안후도、매암함기량、매암물성급위암봉존성능적관계，게시매층기적고산부집규률。연구결과표명중위삼림니탄소택미상구최유리우매층기개발，기차위저위삼림니탄소택미상구。
Coal bearing formation in Shanxi group of South Yanchuan area develops in delta plain facies. Being mesohylile paludal facies, its coal facies types is the main gas productive reservoir of coalbed methane (CBM). Based on core, well logging data, coal rock analysis data, and according to formation conditions and preserving environment of coal forming material, coal facies was fur?ther subdivided into three types of microfacies types such as high forest peat swamp, middle forest peat swamp, and low forest peat swamp. On this basis, through discussing relationship among coal microfacies and coal bed thickness, stone band thickness, meth?ane content, coal physical properties, storage performance, the enrichment law was revealed. The researches show that middle for?est peat swamp microfacies is the most beneficial to CBM development, followed by low forest peat swamp.