库车大北1井区断层侧向封堵性定量评价

Quantitative evaluation on lateral sealing ability of faults in Dabei 1 Area of Kuqa Depression

库车大北1井区是库车坳陷克拉苏冲断带上的一个盐下含气构造,目前区内已完钻10口井,从现有的试油结果来看,每个断圈都含气,但似乎每个断圈都未充满。特别是当大北104井失利后,大北1井区的气水分布关系成为急需理清的首要问题。文中旨在从断层侧向封堵性评价入手,基于大北1井区的现有资料,选用SGR法,并用岩性对接法和断层两侧流体相关参数对比法加以佐证。结果表明,大北1井区F1断层是开启的,而F2,F3断层的侧向封闭能力控制着大北101-103断圈的气水界面,依据已知的大北101-103断圈的气水界面,标定出大北1井区的d值,进而对其他断圈的气水界面作出预测。

Dabei 1 Area is subsalt gas structure in Crassus thrust belt of Kuqa Depression. At present, ten wells have been drilled in this area. From the testing results of existing oil, gases are in each broken trap, but it seems that they are not full filled. Especially, when Well Dabei 104 is lost, the relationship of gas and water distribution becomes an urgent and important issue to be found out in Dabei 1 Area. Proceed from the lateral sealing evaluation of fauh and based on the available data in this area, this paper selected the SGR method, and used the lithology joint method and the contrast of fluid parameters on both sides of fault as additional evidence. The results show that the F1 fauh of Dabei 1 Area is open. The lateral sealing ability of F2 and F3 faults controls the gas-water interface of Dabei 101-103 broken trap. Based on this gas-water interface, the d value of Dabei 1 Area is demmvated in order to predict the gas-water interface of the other broken traps.