| 潜江凹陷潜江组地温-地压系统特征及其与油气成藏关系 |
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| 引用本文： | 付鑫,叶加仁,朱红涛,王柯,康建云.潜江凹陷潜江组地温-地压系统特征及其与油气成藏关系[J].地球科学,2012,37(4):860-868. |
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| 作者姓名： | 付鑫 叶加仁 朱红涛 王柯 康建云 |
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| 作者单位： | 1.中国地质大学构造与油气资源教育部重点实验室，湖北武汉 430074 |
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| 基金项目： | “十二五”国家科技重大专项2011ZX05023-001霍英东教育基金会资助项目132020 |
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| 摘 要： | 基于200余口钻井的实测地温、地压及声波测井等资料，利用地温-地压系统原理，剖析了潜江凹陷潜江组的地温场、压力场及温压系统特征，并从油气生成、保存及分布角度探讨了温压系统与油气成藏的关系.研究表明:蚌湖和周矶向斜带具有较高的地温梯度，有利于潜江组烃源岩成熟生烃.潜江组砂岩今地层压力多为常压，深部泥岩欠压实发育，强化了深部泥岩的封闭作用.潜江组纵向发育静压型和高压型两类地温-地压系统，其中静压型主要发育于潜北陡坡带、东部斜坡带和西部斜坡带，以自生自储型油气藏为主；高压型发育于蚌湖和周矶向斜带，油气藏集中分布在深层超压体系顶部和浅层常压体系内部.平面上可划分为常温高压、低温高压、高温常压、常温常压、低温常压、高温低压、常温低压和低温低压8个分区，油气多分布于常温常压区.
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| 关 键 词： | 温压系统 油气 成藏 潜江组 潜江凹陷 地层学 |
| 收稿时间： | 2012-02-11 |
Characteristics of Geotemperature-Geopressure System of the Qianjiang Formation in the Qianjiang Depression and Their Relationship with Petroleum Accumulation |
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| Abstract: | Based on the measured temperature, pressure and acoustic log data of more than two hundred wells, the distribution characteristics of geothermal field, geopressure field and the geothermal-geopressure system of the Qianjiang Formation in the Qianjiang depression are analyzed by using the theory of geothermal-geopressure system. The relationship between the systems with petroleum accumulation is also discussed from the perspectives of hydrocarbon generation, preservation and distribution. This research comes to the following results: The Banghu and Zhouji syncline belts have higher geothermal gradient, which is favorable to the maturation of the Qianjiang Formation source rock expulsion. The present pressures of the Qianjiang Formation and stones mostly belong to normal range, whereas the deep Qianjiang Formation mudstones present uncompaction which enhanced its seal ability. In vertical, the T-P system of the Qianjiang Formation includes two kinds of static pressure and overpressure. The static pressure systems mainly distribute at the Qianbei steep slope belt, the eastern slope belt and the western slope belt where the reservoirs were formed by self-generation and self-storage, whereas the overpressure systems exist in the Banghu and Zhouji syncline belts where the reservoirs are distributed mostly at the top of the deep overpressure system and within the shallower normal pressure system. The lateral T-P systems can be divided into 8 subareas, namely, NTHP, LTHP, HTNP, NTNP, LTNP, HTLP, NTLP and LTLP, and the NTNP is the place where petroleum mainly accumulated. |
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