THE CHARACTERISTICS OF MINERAL COMPONENTS FOR EFFECTIVE SOURCE ROCKS FROM DONGYING DEPRESSION OF BOHAI BAY BASIN AND ITS SIGNIFICANCE
-
摘要: 渤海湾盆地东营凹陷有效烃源岩X射线衍射分析结果表明,沙三下和沙四上亚段有效烃源岩主要由石英、长石、粘土(伊利石和伊/蒙混层)和碳酸盐(方解石和白云石)组成,并含少量黄铁矿、膏盐、石盐以及钙芒硝,表明这2套烃源岩沉积于半深湖及深湖相咸化、碱性、强还原水体;伊/蒙混层矿物的混层比可以较真实地反映烃源岩成熟度特征。2套有效烃源岩矿物组成特征与高产页岩气的页岩矿物组成特征相似,富含脆性矿物而低含粘土矿物,有利于产生裂缝,易于被压裂,也有利于页岩气的开采。东营凹陷利津洼陷和民丰洼陷的主洼区,应是页岩气勘探与开发的有利地区。Abstract: The results of X-ray diffraction of effective source rocks in Dongying Depression of the Bohai Bay Basin show that the main mineral components of effective source rocks for Es3(下) and Es4(上) are quartz,feldspar,clay(illite and illite-smectite),carbonate(calcite and dolomite);the minor mineral components are pyrite,gypsum,anhydrite,mineral salt and brongniartine.This suggests that both source rocks are deposited in moderate deep or deep lacustrine facies with brinish,alkalic and strength reduction water body.The percent of smectite in illite-smectite(%S) of effective effective source rocks can quite truly reflect the thermal maturity of source rocks.The characteristics of mineral components for both source rocks are similar to the shale with high production of shale gas,that is rich in brittle minerals and lower in clay mineral.This means both source rocks in Dongying Depression are favorable to form fracture and can be fractured easily,and are also favorable to produce shale gas.The favorable places for prospecting and developing shale gas in Dongying Depression are at the main sag of Lijin and Minfeng.
-
[1] 张林晔,刘庆,张春荣.东营凹陷成烃与成藏关系研究[M].北京:地质出版社,2005;1-187. [2] 刘庆.东营凹陷东辛油田油源分析和成藏过程研究[J].成都理工大学学报(自然科学版),2005,32(3):263-270. [3] 刘伟.东营凹陷沙河街组烃源岩结构对排烃及成藏的控制作用[J].油气地质与采收率,2005,12(5):30-32. [4] 孙永壮.东营凹陷南斜坡地层油藏成藏规律[J].油气地质与采收率,2006,13(4):52-54. [5] 周建林.胜坨整装油田成藏模式和油气勘探[M].东营:石油大学出版社,2004:33-50. [6] 刘华,蒋有录,杨万琴,等.东营凹陷中央隆起带油-源特征分析[J].石油与天然气地质,2004,25(1):39-43. [7] 朱光有,金强.东营凹陷两套优质烃源岩层地质地球化学特征研究[J].沉积学报,2003,21(3):506-512. [8] 谭丽娟,蒋有录,苏成义,等.东营凹陷博兴地区烃源岩和油源特征[J].石油大学学报(自然科学版),2002,26(5):1-4. [9] 李佩珍,张学军,黄蓉,等.低熟烃源岩的有机岩石学描述及研究[J].沉积学报,1997,15(2):169-172. [10] 苗建宇,祝总祺,刘文荣,等.济阳坳陷古近系-新近系泥岩孔隙结构特征[J].地质论评,2003,49(3):330-336. [11] 赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001:117-124. [12] 谢明举,邱楠生.东营凹陷镜质体反射率异常的无机作用探讨[J].西安石油大学学报(自然科学版),2005,20(5):12-16. [13] 郭汝泰,王建宝.高喜龙,等.应用激光探针技术评价烃源岩成熟度:以东营凹陷生油岩研究为例[J].自然科学进展,2003,13(6):626-630. [14] 李志明.徐旭辉.秦建中,等.镜质体反射率抑制与烃源岩质量关系:以渤海湾盆地东营凹陷烃源岩为例[J],石油实验地质,2008,30(3):276-280. [15] 李志明,关德范,徐旭辉,等.有效泥质油源岩有机碳丰度评价标准研究:以东营凹陷为例[J].石油实验地质,2009,31(4):379-383. [16] 聂海宽,唐玄,边瑞康.页岩气成藏控制因素及中国南方页岩气发育有利区预测[J].石油学报,2009,30(4):484-491. [17] 张林晔,李政,朱日房,等.济阳坳陷古近系存在页岩气资源的町能性[J].天然气工业,2008,28(12):26-29. [18] MANGER K C,CURTIS J B.Geological influences on location and production of Antrim shale gas[J].Devonian Gas Shales Technology Review,1991,7(2):5-16. [19] 李新景.胡素云,程克明.北美裂缝性页岩气勘探开发的启示[J].石油勘探与开发,2007,34(4):392-400. -
计量
- 文章访问数: 2414
- HTML全文浏览量: 37
- PDF下载量: 1533
- 被引次数: 0