CAJ | 학술논문

通过显微薄片、扫描电镜及X射线衍射等对赣东北下寒武统荷塘组44块黑色泥页岩进行了实验分析，从地球化学特征、岩石学特征、物性与储集空间特征等方面对泥页岩储层特征进行了研究。研究结果表明：研究区荷塘组泥页岩厚22.1～735.0 m，单层厚度可达19.59～125.16 m；有机质含量在3.32%～11.40%，平均为5.75%；成熟度为2.35%～4.90%，总体偏高，属于过成熟阶段；矿物成分主要以石英、黏土矿物、方解石、黄铁矿和白铁矿为主，脆性矿物含量为18.95%～51.84%，平均含量为40.97%；微孔裂隙发育，形态多样。赣东北荷塘组与北美典型商业性页岩气产区相比具有差异，主要表现在荷塘组页岩的有效厚度较大、T OC含量和吸附气比例较高，其不利条件主要表现为埋藏较深、成熟度过高等方面。
통과현미박편、소묘전경급X사선연사등대공동북하한무통하당조44괴흑색니혈암진행료실험분석，종지구화학특정、암석학특정、물성여저집공간특정등방면대니혈암저층특정진행료연구。연구결과표명：연구구하당조니혈암후22.1～735.0 m，단층후도가체19.59～125.16 m；유궤질함량재3.32%～11.40%，평균위5.75%；성숙도위2.35%～4.90%，총체편고，속우과성숙계단；광물성분주요이석영、점토광물、방해석、황철광화백철광위주，취성광물함량위18.95%～51.84%，평균함량위40.97%；미공렬극발육，형태다양。공동북하당조여북미전형상업성혈암기산구상비구유차이，주요표현재하당조혈암적유효후도교대、T OC함량화흡부기비례교고，기불리조건주요표현위매장교심、성숙도과고등방면。
From geochemistry,petrology-physical properties and characteristics of the reservoir space,the shale reservoir characteristics are studied by microscopic section,scanning electron microscopy and X-ray diffraction experimental analysis of 44 black shales from the lower Cambrian Hetang Formation in northeastern Jiangxi. The results show that the Hetang Formation shale ranging from 22.1 to 735.0 m,single layer thickness ranges from 19.59 to125.16 meters in the study area. Organic matter content is high,range from 3.32%to 11.40%,averaging 5.75%,The maturity is high,between 2.35%～4.90%,belonging to a mature stage. Mineral composition mainly includes quartz,clay minerals,calcite,pyrite and marcasite and its brittle mineral content is between 18.95%～51.84%with an average content of 40.97%. The microporosity is well developed. The Hetang Formation has some differences compared to five commercial shale gas producing areas in the U. S. It is thick and contains brittle mineral. Organic matter content and gas content is high. The adverse conditions is that it is buried deeply and the maturity is too high.