Sedimentary facies of Carboniferous carbonate rock in Bashitop Oil Field, Tarim Basin
-
摘要: 塔里木盆地巴什托区块石炭系包括3个组,自下而上为巴楚组、卡拉沙依组和小海子组.沉积相为碳酸盐岩台地,包括蒸发台地、局限台地、开阔台地3种亚相.岩石类型主要为碳酸盐岩,夹薄层碎屑岩和膏岩.巴楚组沉积晚期,本区陆源碎屑物质注入急剧减少,形成了一套富含生物碎屑的碳酸盐岩地层,发育局限台地亚相沉积.卡拉沙依早中期为蒸发台地夹局限台地亚相沉积,晚期为局限台地环境.小海子期海侵范围扩大,大部分地区为开阔台地沉积.由于海平面升降变化的周期性,使各种微相类型在垂向序列上呈规律性重复叠置,从而在空间上构成有规律的储盖组合,石炭系共发育3套良好储盖组合,其中小海子组发育2套,巴楚组发育1套.小海子组油气层主要分布在BK4H-麦4-麦6井一带的构造高部位.巴楚组油气层分布于麦10-BK4H-麦6井一带的构造高部位.Abstract: In Bashitop area of the Tarim Basin,from bottom to top,Carboniferous can be divided into 3 formations:Bachu,Kalashayi and Xiaohaizi.Sedimentary facies of the study area are carbonate platform,which may be further divided into 3 subfacies including evaporated,restricted and open ones.Carbonate rocks are very common,interbedded with clastic and gypsum rocks.During the late Bachu period,terrigenous detrital supplies decreased and a set of carbonate rock rich in biodetritus was formed,and the restricted platform subfacies was deposited.During the early and middle Kalashayi period,the study area was dominated by evaporated and restricted platform subfacies while in the late Kalashayi period,it turned to restricted platform.In the Xiaohaizi period,open platform spread in most of the study area.Due to the cyclicity of sea level change,all microfacies lie in rule and form reservoir-seal assemblages.3 above-mentioned assemblages have been found in Carboniferous,2 in the Xiaohaizi Formation and 1 in the Bachu Formation.Petroleum in the Xiaohaizi Formation mainly locates around well BK4H,M4 and M6.Petroleum in the Bachu Formation mainly locates around well M10,BK4H and M6.
-
Key words:
- sedimentary facies /
- Carboniferous /
- Bashitop area /
- Tarim Basin
-
[1] 张荣虎,冯庆付,张惠良,等.塔里木盆地群苦恰克地区石炭系生屑灰岩段储层特征及有利储层控制因素[J].地质学报,2009,83(4):590-598. [2] 张惠良,张荣虎,李勇,等.塔里木盆地麦盖提斜坡西段石炭系生屑灰岩段旋回划分及意义[J].地层学杂志,2008,32(1):91-98. [3] 王辉,詹伟,许英,等.新疆巴什托-亚松迪地区石炭-二叠系碳酸盐岩储层特征[J].新疆地质,1999,17(3):255-262. [4] 朱如凯,罗平,罗忠.塔里木盆地晚泥盆世及石炭纪岩相古地理[J].古地理学报,2002,4(1):13-24. [5] 何登发,柳少波,李洪辉,等.塔里木盆地大油田的勘探方向:以麦盖提斜坡构造为例[J].勘探家,1999,4(2):57-64. [6] 张荣虎,张惠良,沈安江,等.塔里木盆地西部石炭系生屑灰岩段沉积环境与优质储层关系[J].天然气地球科学,2007,18(4):501-508. [7] 马青,王振宇,王兴志,等.塔里木盆地石炭系生屑灰岩段沉积相研究[J].西南石油学院学报,2003,25(1):20-24. [8] 吕修祥,杨海军,白忠凯,等.塔里木盆地麦盖提斜坡东段油气勘探前景[J].石油实验地质,2010,32(6):521-526. [9] 陈强路,周凌方,张根法,等.塔里木盆地巴楚-麦盖提地区油气勘探领域评价[J].石油实验地质,2009,31(4):343-349. [10] 邵志兵,吕海涛,耿锋.塔里木盆地麦盖提地区石炭系油藏地球化学特征[J].石油与天然气地质,2010,31(1):84-90. [11] 马永生.碳酸盐岩储层沉积学[M].北京:地质出版社,1999:121-153. [12] 张儒佳,柳春云,郭峰.塔里木盆地巴什托区石炭系沉积特征[J].新疆石油地质,2011,32(1):42-44. -
计量
- 文章访问数: 2979
- HTML全文浏览量: 264
- PDF下载量: 951
- 被引次数: 0