孔雀河斜坡志留系沉积特征及油气分布规律
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摘要
文章旨在通过沉积相的研究,弄清孔雀河斜坡储盖组合,解决长期以来勘探成功率极低,在油气源充足的情况条件下找不到大油气田的问题。利用单井沉积相分析、典型井岩心分析、野外剖面资料和地震测线资料研究结果,得出了塔里木盆地孔雀河地区志留系沉积特点、演化特征及平面展布规律,指出该区在志留纪的沉积是以滨海—浅海为主的海陆过渡相,在北部区域发育有三角洲;结合单井试油试气资料,研究认为该区的浅海沉积物几乎全部是砂岩,缺少泥岩盖层,因而以前所钻4口探井都以失利告终,这也是长期在该区找不到油气田的症结,而孔雀河1井正好钻在位于北部的三角洲沉积区域,该区地层具有砂、泥互层的特点,具备了较好的储集层和局部盖层,试油结果表明有24个气层,该井的东部及东北部的三角洲区域是今后勘探的有利区域。
Through investigating the sedimentary characteristics, evolution and distribution of Silurian in Kongquehe Slope area by use of the sedimentary facies analysis of single well, the core analysis of typical well, the outcrop research and the seismic data, it is pointed out in the paper that the Silurian in the area belonged in transitional facies being mainly composed of littoral-neritic deposits but the delta facies was developed in its north. In combination with the research on the production test data of single well, it was considered that the neritic deposits are almost wholly comprised of sandstones,so this area is lacking in shale caprocks.This is the reason why the four exploration wells drilled defore were all defeated and no oil and gas field was found out in the area for a long time).The well Kongquehe-1, however, was just drilled at the deltaic deposit zone in the north and there are good reservoir rocks and local caprocks in the zone, because of the alternating layers of sand-shale. The production test results indicated that there are 24 gas layers in the well, so that the deltaic deposit zones to the east and northeast of the well are favorable for oil and gas exploration in the future.(Financed by the International Science and Technology Cooperation Program project, No.2002CB2397, of the Ministry of Science and Technology)
Through investigating the sedimentary characteristics, evolution and distribution of Silurian in Kongquehe Slope area by use of the sedimentary facies analysis of single well, the core analysis of typical well, the outcrop research and the seismic data, it is pointed out in the paper that the Silurian in the area belonged in transitional facies being mainly composed of littoral-neritic deposits but the delta facies was developed in its north. In combination with the research on the production test data of single well, it was considered that the neritic deposits are almost wholly comprised of sandstones,so this area is lacking in shale caprocks.This is the reason why the four exploration wells drilled defore were all defeated and no oil and gas field was found out in the area for a long time).The well Kongquehe-1, however, was just drilled at the deltaic deposit zone in the north and there are good reservoir rocks and local caprocks in the zone, because of the alternating layers of sand-shale. The production test results indicated that there are 24 gas layers in the well, so that the deltaic deposit zones to the east and northeast of the well are favorable for oil and gas exploration in the future.(Financed by the International Science and Technology Cooperation Program project, No.2002CB2397, of the Ministry of Science and Technology)
引文
1 陈发景,汪新文,张光亚,李光,曹守连,罗传容.新疆塔里木盆地北部构造演化与油气关系.北京:地质出版社,1996:143~145
2 谢晓安,吴奇之,卢华复.塔里木盆地古生代构造桁架与沉积特征.沉积学报,1997;15(3)
3 叶德胜,王恕一,张希明,陈洪德等.新疆塔里木盆地北部储层沉积、成岩特征及储层评价.成都:原成都科技大学出版社,1995
4 朱筱敏,王贵文,谢庆宾.塔里木盆地志留系沉积体系及分布特征.石油大学学报(自然科学版),2002;26(3):5~11
5 于兴河编著.碎屑岩系油气储层沉积学.北京:石油工业出版社,2002:258,215
6 纪友亮,彭传圣,张立强.新疆库鲁克塔格奥陶纪岩相古地理.古地理学报,2002;4(1):43~52
7 汤良杰.塔里木盆地演化和构造样式.北京:地质出版社,1996:24~25
8 顾家裕主编.塔里木盆地沉积层序特征及其演化.北京:石油工业出版社,1996:310,138
9 黄太柱,马慧明.塔里木盆地满加尔坳陷的演化过程及石油地质特征.新疆石油地质,1996;14(2):97~110
10 周永昌,李艾红.塔里木盆地满加尔坳陷库刹克构造特征及含油气分析.新疆石油地质,1998;16(3):245~255
2 谢晓安,吴奇之,卢华复.塔里木盆地古生代构造桁架与沉积特征.沉积学报,1997;15(3)
3 叶德胜,王恕一,张希明,陈洪德等.新疆塔里木盆地北部储层沉积、成岩特征及储层评价.成都:原成都科技大学出版社,1995
4 朱筱敏,王贵文,谢庆宾.塔里木盆地志留系沉积体系及分布特征.石油大学学报(自然科学版),2002;26(3):5~11
5 于兴河编著.碎屑岩系油气储层沉积学.北京:石油工业出版社,2002:258,215
6 纪友亮,彭传圣,张立强.新疆库鲁克塔格奥陶纪岩相古地理.古地理学报,2002;4(1):43~52
7 汤良杰.塔里木盆地演化和构造样式.北京:地质出版社,1996:24~25
8 顾家裕主编.塔里木盆地沉积层序特征及其演化.北京:石油工业出版社,1996:310,138
9 黄太柱,马慧明.塔里木盆地满加尔坳陷的演化过程及石油地质特征.新疆石油地质,1996;14(2):97~110
10 周永昌,李艾红.塔里木盆地满加尔坳陷库刹克构造特征及含油气分析.新疆石油地质,1998;16(3):245~255
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