一体化解释在塔河油田三叠系油藏预测中的应用

Application of integrated data interpretation in prediction for the Triassic reservoirs in Tahe oilfield

在综合地质、测井、地震解释成果开展约束反演及提高储层预测精度的基础上,对塔河油田三叠系储层展布和油藏特征进行了分析,认为塔河油田中三叠统中、下油组油藏主要受构造控制。因此,在三叠系油藏勘探中应立足于新的低幅度构造圈闭油藏,应向工区东南部扩展研究范围,查清1区中、下油组的构造圈闭情况,结合地震振幅属性异常区布设钻井。中三叠统阿克库勒组四段内的次砂体在油田区西北部较发育,其上倾方向尖灭线落在油田区内,存在形成岩性圈闭的条件。在储量计算的基础上,认为2区不适合打新的开发井,特别是水平井。

The distribution and characteristics of the Triassic reservoirs in Tahe oilfield was studied based on interpretation of geologic, well logging, and seismic data. The reservoirs of the middle and lower Triassic intervals are controlled by structures. Therefore the focus of exploration for the Triassic hydrocarbon reservoirs should be paid on structurally entrapped low amplitude reservoirs. The investigation region should be extended to the southeast part of the survey area with emphasis on thorough investigation of the structural traps in the middle and lower intervals in block one of Tahe oilfield and wells should be placed in combination with seismic amplitude anomaly analysis. The sand body of the middle Triassic Akekule Formation the fourth member grows well in northwest part of the survey area. We should pay high attention to it because its updip wedgeout lies in the oilfield, favorable for forming lithological traps. Based on calculation of reserves, the author believes that no well, especially horizontal well should be placed in block two of Tahe oilfield.