蜀南西南地区海相烃源岩特征与评价  

Characteristics and Evaluation of Marine Source Rock in Southwestern Shunan

作　　者：戴鸿鸣[1] 黄东[1] 刘旭宁[2] 杨毅[1] 贺雪萌[2] 彭海润[2] 童俊文[2] 

机构地区：[1]西南石油大学,四川成都610500 [2]中国石油西南油气田分公司蜀南气矿,四川泸州646001

出　　处：《天然气地球科学》2008年第4期503-508,共6页Natural Gas Geoscience

基　　金：四川省重点学科建设基金项目(编号:SZD0414)资助

摘　　要：目前,蜀南西南地区已成为四川盆地勘探的热点和重点地区之一。根据实测和收集的烃源岩数据,从有机碳含量、有机质类型、有机质成熟度以及生烃强度等参数对区内海相烃源岩进行了评价。认为区内烃源岩主要发育在下寒武统筇竹寺组、下志留统龙马溪组、二叠系阳新统以及下三叠统嘉陵江组,其中以泥岩为主;烃源岩有机碳含量高;有机质类型好,干酪根以Ⅰ—Ⅱ1型为主;成熟度较高,现今处于高成熟—过成熟阶段,以产气为主;下寒武统、下志留统烃源岩条件最好,是该区主力烃源层系,平均生烃强度分别为63×108m3/km2、44.5×108m3/km2。At present, the southwestern Shunan region has become a hot spot for exploration and a key area. According to measured and collected data of source rocks, parameters, such as organic carbon content, organic matter type, maturity of organic matter and the intensity to generate hydrocarbon have been evaluated. It shows that source rocks in the area are mainly developed in the Lower Cambrian Qiongzhusi Formation, the Lower Silurian Longmaxi Formation, the Permian Yangxin Series and Lower Triassic Jialingjiang Formation. Among them, clay-stone is predominant. The organic carbon content is high in the source rock. The organic material type is good. The main kerogen type is Ⅰ-Ⅱ1. Maturity is high. Gas generation is predominant during the high mature and post mature phases. The hydrocarbon generation in-tensity shows that the condition of Lower Cambrian and Lower Silurian source rock is the best. And they are the main source layer systems in this area. The average hydrocarbon generation intensity is 63 ×10^8m^3/ km^2 and 44.5×10^8m^3/km^2, respectively.

关 键 词：蜀南西南地区 海相烃源岩 地球化学 成熟度 生烃强度 

分 类 号：TE122.113[石油与天然气工程—油气勘探]