桥口构造沙三段气藏特征及其控制因素
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摘要
桥口构造沙三段气藏具有埋深大、含气井段长、储层物性差且纵横向变化大、气层产能低、压力不稳的特点。通过对岩性成分、结构、沉积相带、物性、盖层、构造、烃源岩演化等多方面控制因素的分析认为 ,在诸多的控制因素中 ,沉积相带是主控因素 ,重力流水道砂体及湖底扇中扇辫状水道不仅物性好 ,而且埋藏在生烃洼陷泥岩之中 ,利于捕获油气而富集成藏。因此 ,加强沉积相的精细研究 ,将地震资料与测井资料结合起来分析有利的沉积相带 ,进行储层预测 ,将是下步勘探工作的重点
Gas reservoir in Es\+3 interval of Qiaokou structure is characterized by its great buried depth,long gas-bearing interval,poor physical property,great change longitudinally and transversally,low productivity of gas bearing strata and unstable pressure.It is believed,by analyzing structure of litho-composition,sedimentary facies belts,physical property,overburden,structure and hydrocarbon evolution,that sedimentary facies is the main factor among several controlling factors,gravitational flow channel sandbody and physical property of fan-braided channel in the sublacustrine fan is not good but also buried in mudstone of hydrocarbon genetic depression which is favorable for hydrocarbon trapping and accumulating to reservoir.Therefore,it is necessary to stress the importance of next step exploration by strengthening a carefully study of sedimentary facies,analyzing those favorable sedimentary facies by combining seismic data with data of well-logging,predicating reservoir.
Gas reservoir in Es\+3 interval of Qiaokou structure is characterized by its great buried depth,long gas-bearing interval,poor physical property,great change longitudinally and transversally,low productivity of gas bearing strata and unstable pressure.It is believed,by analyzing structure of litho-composition,sedimentary facies belts,physical property,overburden,structure and hydrocarbon evolution,that sedimentary facies is the main factor among several controlling factors,gravitational flow channel sandbody and physical property of fan-braided channel in the sublacustrine fan is not good but also buried in mudstone of hydrocarbon genetic depression which is favorable for hydrocarbon trapping and accumulating to reservoir.Therefore,it is necessary to stress the importance of next step exploration by strengthening a carefully study of sedimentary facies,analyzing those favorable sedimentary facies by combining seismic data with data of well-logging,predicating reservoir.
引文
1 中原石油勘探局东濮凹陷及邻区构造特征与油气关系研究[M]北京:石油工业出版社,1991
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2 寿建峰,王生朗,袁政文东濮凹陷第三系碎屑岩储层研究及评价[A]见:车卓吾中原油田科技论文集(1975～1995)[C]北京:石油工业出版社,1995
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4 蒋有录渤海湾盆地盖层对天然气富集的影响初探[J]地质论评,1999,45(1):26～31
5 蒋有录,张一伟天然气藏与油藏形成机理及分布特征的异同[J]地质科技情报,2000,19(1):69～72
6 朱家祥,李淑贞,朱家蔚,等超深井成烃成岩体系研究[M]上海:同济大学出版社,199537～41
7 戴金星,宋岩,戴春森,等中国东部无机成因气及其气藏形成条件[M]北京:科学出版社,199764～186
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