昌潍坳陷侯镇凹陷孔二段生烃条件  

Hydrocarbon-generating conditions of Kong 2 member of Houzhen sag in Changwei depression

作　　者：李丙喜[1] 高世臣[2] 张明星[3] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]中国地质大学(北京)数理学院,北京100083 [3]中国石化胜利油田分公司石油开发中心,山东东营257000

出　　处：《油气地质与采收率》2014年第2期80-83,116,共4页Petroleum Geology and Recovery Efficiency

摘　　要：为重新认识侯镇凹陷勘探潜力,对其开展了构造、古地理环境、烃源岩地球化学参数及生烃条件研究。结果表明,侯镇凹陷具有与邻区潍北凹陷相近的构造背景,孔二段沉积时期主要发育扇三角洲、滨浅湖和半深湖3种沉积相。滨浅湖相控制了研究区的大部分区域,扇三角洲相主要发育于研究区的北部和南部边缘,半深湖相主要分布于寿光凸起东部、侯2井南部以及紧邻圩河断层一带,是烃源岩发育的有利相带。孔二段有机质评价为差—中等烃源岩,热演化达到了大量生烃阶段。钻井与地震资料预测结果表明,孔二段暗色泥岩大于100 m的区域面积为530 km2。采用蒙特卡罗法对侯镇凹陷孔二段资源量进行了计算,在风险程度中等即累积概率为50%时,资源量为0.238×108t。In order to recognize the exploration potential of Houzhen sag,the Houzhen sag are studied herein with respects to structure,paleogeographic environment and geochemical characteristics of the source rocks,hydrocarbon-generating conditions.Studies showthat the Houzhen sag's structure background is similar to Weibei sag that is adjacent to Houzhen sag.During the deposition of Kong 2member,three sedimentary facies are developed: fan delta,shore-shallow lake,semi-deep lake.Most of the study area is controlled bythe shore and shallow lake sedimentary face,and the fan delta face is developed on the north and south margins of the study area,thesemi-deep lake face distributes until the east of Shouguang uplift,the south of Hou 2 well and adjacent to Weihe fault,and is favorableto development of source rock.The source rock of Kong 2 member of Houzhen sag is poor to medium source rock,and its thermal evolu-tion is in stage of quantity hydrocarbon generation.Combining with drilling and seismic data,the thickness of source rock of Kong 2member up to 100 m covers an area of 530 square kilometers.The Monte-Carlo method is used to calculate the hydrocarbon resourcebased on existing data,the hydrocarbon resource amount is 0.238×108t at medium risk.A parameter well is proposed for accurate eval-uationof hydrocarbon-generating conditions and reservoir forming conditions of Kong 2 member in Houzhen sag.

关 键 词：生烃条件 有机质特征 生烃量 蒙特卡罗法 孔二段 侯镇凹陷 

分 类 号：TE112.115[石油与天然气工程—油气勘探]