珠江口盆地白云凹陷深水区LW3-1气田有效气源区与运聚模式探讨  

The effective gas-source area and gas migration-accumulation model in LW3-1 gasfield, Baiyun sag deep water area,Pearl River Mouth basin

作　　者：朱俊章 蒋爱珠[2,3] 施和生 孙永革[4] 庞雄 张志琳 龙祖烈 张永东[2,3] 柴平霞[2] 施洋 

机构地区：[1]中海石油(中国)有限公司深圳分公司 [2]中国科学院广州地球化学研究所有机地球化学国家重点实验室 [3]中国科学院研究生院 [4]浙江大学地球科学系

出　　处：《中国海上油气》2012年第4期25-31,共7页China Offshore Oil and Gas

基　　金："十二五"国家科技重大专项"南海北部深水区油气成因与运聚过程(编号:2011ZX05025-003-004)"部分研究成果

摘　　要：应用天然气分子碳同位素生成动力学技术,对LW3-1气田有效气源区和运移聚集史进行了系统研究,结果表明:该气田有效气源区为白云主洼东部斜坡带恩平组浅湖相—沼泽相沉积烃源层,现今埋深(从海底计算)范围介于4 600～6 000 m;该气田属于阶段性累积聚气,成藏时间较晚,有效充注期在8～0Ma,目前仍处于有效充注阶段。这一新认识对于珠江口盆地白云凹陷深水区天然气勘探具有重要的指导意义。By using the technique of generation ki- netics of molecule carbon isotopes in natural gas, the effective gas-source rocks and migration-accumulation history were systematically investigated for LW3-1 gasfield. The results have showed that the effective gas source area in the gasfield is in Enping Formation of shallow lake-swamp facies, with its present burial depth between 4 600 and 6 000 m, and that this gasfield is characterized by episodical and cumulative accumulation and later forming of gas pools, and still in the effective gascharge stage currently clue to its effective charge period from 8 to 0 Ma; All these conceptions will be very helpful to the future gas exploration in Baiyun sag deep water area, Pearl River Mouth basin.

关 键 词：珠江口盆地 白云凹陷 深水区 LW3—1气田 天然气分子碳同位素生成动力学 有效气源区 运聚模式 

分 类 号：P618.13[天文地球—矿床学]