Causes for complex oil and water distribution in parts of Chang 8 reservoir, Huaqing area, Ordos Basin
-
摘要: 华庆地区位于长7源岩的发育区,油源充足,成藏条件有利,区内也发现许多高产富集区,但该区油的分布不均,局部高孔高渗带测试产大水,如白241等井。根据大量钻测井、试油试采以及储层荧光等分析资料,系统地研究了华庆地区长8油藏局部油水分布复杂的原因,指出长8油藏局部高孔高渗带出水的原因是长7源岩与储层之间存在泥岩隔层,它阻碍源岩生成的油往下运移到长8储层,源岩与储层之间的输导层控制了该区长8储层的含油性。该认识为研究区下一步的勘探和评价提供了可靠的地质依据。Abstract: Huaqing area locates at the development area of Chang 7 source rocks, where oil supplies are sufficient and reservoir formation conditions are favorable. Many petroliferous zones have been found; however, the distribution of oil in the area is unbalanced. In some local regions with high porosity and permeability, a large amount of water has been found in well testing, for example, in well Bai 241, etc. Based in the data of well drilling, logging, testing and reservoir fluorescence, it is analyzed in this paper the causes for the complex oil and water distribution in parts of Chang 8 reservoir, Huaqing area, the Ordos Basin. It is pointed out that mudstone layers between the Chang 7 source rocks and the Chang 8 reservoir block the migration of oil generated from the Chang 7 source rocks into the Chang 8 reservoir. The carrier bed between source rocks and reservoir controls the potentials of Chang 8 reservoir. These conclusions provide geological basis for further exploration and evaluation in the study area.
-
Key words:
- hydrocarbon source rock /
- mudstone layer /
- oil and water distribution /
- Chang 8 reservoir /
- Huaqing area /
- Ordos Basin
-
[1] 何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003:10-335. [2] 窦伟坦,侯明才,陈洪德,等.鄂尔多斯盆地三叠系延长组油气成藏条件及主控因素研究[J].成都理工大学学报(自然科学版),2008,35(6):686-692. [3] 付金华,郭正权,邓秀芹.鄂尔多斯盆地西南地区上三叠统延长组沉积相及石油地质意义[J].古地理学报,2005,7(1):34-43. [4] 杨俊杰.鄂尔多斯盆地构造演化与油气分布规律[M].北京:石油工业出版社,2002:10-228. [5] 张文正,杨华,李剑锋,等.论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用:强生排烃特征及机理分析[J].石油勘探与开发,2006,33(3):289-293. [6] 田在艺,张庆春.中国含油气盆地岩相古地理与油气[M].北京:地质出版社,1997:7-256. [7] 陈全红,李文厚,高永祥,等.鄂尔多斯盆地上三叠统延长组深湖沉积与油气聚集意义[J].中国科学:D辑 地球科学,2007,37(增刊):39-48. [8] 喻建,韩永林,凌升阶.鄂尔多斯盆地三叠系延长组成藏地质特征及油藏类型[J].中国石油勘探,2001,6(4):13-19. [9] 杨华,刘显阳,张才利,等.鄂尔多斯盆地三叠系延长组低渗透岩性油藏主控因素及其分布规律[J].岩性油气藏,2007,19(3):1-6. [10] Magoon L B,Dow W G.The petroleum system:from source to trap,AAPG memoir 60[M].Tulsa:AAPG,1994:3-22. -
计量
- 文章访问数: 4032
- HTML全文浏览量: 76
- PDF下载量: 1761
- 被引次数: 0