东营凹陷砂岩透镜体油气成藏机理及有利区预测

张俊; 庞雄奇; 姜振学; 陈冬霞; 杜春国; 李丕龙

东营凹陷砂岩透镜体油气成藏机理及有利区预测

张俊^{1, 2,},
庞雄奇^{1, 2},
姜振学^{1, 2},
陈冬霞^{1, 2},
杜春国¹,
李丕龙³

1.
中国石油大学石油天然气成藏机理教育部重点实验室, 北京 102249
2.
中国石油大学盆地与油藏研究中心, 北京 1022493
3.
中石化胜利油田有限公司, 山东东营 257051

基金项目:

国家自然科学基金项目“砂岩透镜体成藏门限及其控油气作用” 40172057

国家“十五”攻关项目“济阳坳陷隐蔽油气藏成藏机理研究” 2003BA613A-02

详细信息

作者简介:
张俊(1978-), 女, 博士, 主要研究方向为油气成藏机理与分布规律.E-mail: kittyzhangjun126@163.com

中图分类号: P618.13
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出版历程
- 收稿日期: 2005-08-22
- 刊出日期: 2006-03-25

Main Accumulation Controlling Factors and Forecast of Sand Lens Reservoir, Dongying Depression, China

ZHANG Jun^{1, 2
,},
PANG Xiong-qi^{1, 2},
JIANG Zhen-xue^{1, 2},
CHEN Dong-xia^{1, 2},
DU Chun-guo¹,
LI Pi-long³

1.
Key Laboratory of Hydrocarbon Accumulation of Education of Ministry, China University of Petroleum, Beijing 102249, China
2.
Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249, China
3.
Shengli Oilfield Ltd., Dongying 257051, China

摘要

摘要: 近几年济阳坳陷的勘探实践表明, 对岩性油藏的含油性差异、成藏机理尚认识不清, 这制约了隐蔽油气藏的进一步勘探.在东营凹陷145个砂岩透镜体油藏含油性统计分析的基础上, 结合典型透镜体油藏详细解剖和核磁共振物理模拟实验结果综合研究后发现: 砂岩透镜体圈闭形成时的构造和沉积环境、围岩生排烃条件、砂体储集条件是其成藏的主控因素.只有围岩(源岩) 进入供烃门限后, 其与砂体界面处的毛管压力差、烃浓度梯度产生的扩散力和膨胀力3者之和大于砂体中过剩的水向外渗滤遇到的阻力, 即成藏动力大于成藏阻力时, 砂岩透镜体才能成藏.当砂体沉积环境、围岩生排烃条件、砂体自身储集条件3方面均满足一定条件时, 圈闭才具备形成砂岩透镜体油藏的条件, 并且上述3方面条件越优越, 圈闭含油性就越好.用此方法对东营凹陷下第三系沙三中亚段砂岩透镜体油藏的分布进行了预测.
- 陆相断陷盆地 /
- 砂岩透镜体 /
- 主控因素 /
- 成藏动力学机理与模式 /
- 供烃门限 /
- 有利区预测
Abstract: Jiyang sub-basin is the most important area of subtle traps in China. Exploration in recent years has shown that the petroliferous property of the sand lens reservoir is quite different and the accumulation mechanism of lithologic reservoir is not clearly comprehended, restricting further exploration. A statistical analysis of the petroliferous properties of 145 lens reservoirs in Dongying depression was carried out, as well as the analysis of typical lenticular pools and NMR modeling experiments.Resultsshow that structural and sedimentary factors, and hydrocarbon generation and expulsion conditions of the surrounding source rock, as well as reservoir properties, are the main controlling factors for lens reservoir formation. Lens reservoir formation depends primarily upon the balance of accumulation power and resistance. When the hydrocarbon supply thresholds have been exceeded the accumulation power is bigger than the resistance at the sand and mud interface, so oil/gas would possibly accumulate to the lens. Accumulation power is made up of different capillary pressures between source and reserve, and hydrocarbon diffusion, as well as hydrocarbon volume expansion. Resistance is the osmotic resistance of flowing liquid. The better the three accumulation controlling factors are matched, the higher the petroliferous property. By applying the research results, the lens reservoir distribution of the third member of the Neogene Shahejie Formation in Dongying depression is forecast.
- Non-marine rift basin /
- sand lens /
- main accumulation controlling factors /
- dynamic accumulation mechanism /
- hydrocarbon supply thresholds /

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图 1 东营凹陷构造位置及构造区划

Fig. 1. Geographical location and structure of Dongying depression, China

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图 2 东营凹陷砂岩透镜体油藏圈闭充满度与各成藏条件的关系

①.牛庄洼陷; ②.利津洼陷; ③.博兴洼陷; ④.民丰洼陷; ⑤.中央背斜带; ⑥.北部陡坡带; ⑦.南部缓坡带; Ⅰ.深水浊积扇; Ⅱ.水下冲积扇; Ⅲ.三角洲前缘滑塌浊积扇; Ⅳ.三角洲前缘席状砂; Ⅴ.扇三角洲; Ⅵ.河道砂

Fig. 2. Hydrocarbon full degree versus accumulation conditions of Neogene sand lens reservoirs in Dongying depression

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图 3 东营凹陷典型砂岩透镜体油藏各成藏参数对比

Fig. 3. Reservoir parameter bar chart of typical sand lens reservoirs in Dongying depression

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图 4 核磁共振物理模拟实验结果

(a) 围岩条件与含油性的关系; (b) 物性条件与含油性的关系

Fig. 4. Results of NMR physical modeling experiment

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图 5 东营凹陷砂岩透镜体油藏成藏动力学机理与模式

Fig. 5. Accumulation dynamic mechanism of sand lens reservoir in Dongying depression

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图 6 东营凹陷下第三系层序Ⅱ沙三中亚段岩性油藏分布预测

Fig. 6. Forecasting map of sand lens reservoirs of Neogene Shahejie formation in Dongying depression

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表 1 东营凹陷典型落空砂岩透镜体圈闭失利原因分析(胜利油田地质院)

Table 1. Reason analysis of typical oil-empty sand lens reservoirs

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