川西邛崃—蒲江蓬莱镇组高分辨率层序地层研究  

RESEARCH ON HIGH RESOLUTION SEQUENCE STRATIGRAPHY OF JURASSIC PENGLAIZHEN FORMATION IN WEST SICHUAN

作　　者：雷卞军[1] 杨跃明[2] 蒋裕强[1] 彭先[2] 朱永刚[2] 李跃刚[2] 蔡开平[2] 赵永刚[1] 

机构地区：[1]西南石油学院 [2]中国石油西南油气田分公司川西北气矿

出　　处：《天然气工业》2003年第6期68-73,共6页Natural Gas Industry

摘　　要：川西邛崃—蒲江侏罗系蓬莱镇组主要属于湖成三角洲相。本次高分辨率层序地层学研究将蓬莱镇组划分 2个长期基准面旋回 ,6个中期基准面旋回 ,38～ 4 0个短期基准面旋回。在层序地层、岩性和沉积相研究基础上 ,对白马庙气田蓬莱镇组的段、亚段的划分方案进行了优化。蓬莱镇组分为 5个段 ,主力气层蓬Ⅲ、蓬Ⅳ段又进一步细分亚段。川西蓬莱镇组中、长期基准面旋回具有垂向上不对称性。中期基准面旋回层序的不对称性最为显著 ,其最能体现前陆沉积盆地的充填层序特征。文章对川西蓬莱镇组储集砂体和盖 (隔 )层发育规律作了概要总结和预测。Penglaizhen formation in Qionglai - Pujiang County of west Sichuan mainly belongs to lacustrine delta facies. Based on the result of studying the high resolution sequence stratigraphy, the formation can be classified into 2 long-term base-level cycles, 6 middle-term base-level cycles and 38-40 short-term base-level cycles. Furthermore, the delimitation about the member and sub-member of Penglaizhen formation in Baimamiao gas field is optimaly made in the light of researching sequence stratigraphy, lithology and sedimentary facies. As the main gas layers, Peng-III and Peng-IV members among the 5 members of the formation are also divided into many sub-members. The middle-term base-level cycles and long-term base-level sycles are of non-symmetry in vertical and the former with maximum non-symmetry mostly displays the filling sequence characteristics of foreland basin. The development regularities of the reservoir sandbody and cap rock of Penglaizhen formation in west Sichuan are summaried and predicted in this paper.

关 键 词：浅层气藏 储集层 高分辨率 层序地层学 晚侏罗世 四川盆地 前陆盆地 川西邛崃-蒲江蓬莱镇组 

分 类 号：P539.2[天文地球—古生物学与地层学]