【摘要】 通过探井地层测温资料收集及地温梯度计算,建立了莫里青断陷基底埋深预测模型,确定了断陷内不同二级构造单元内烃源岩生烃门限深度以及双阳组有效烃源岩的范围。研究表明,莫里青断陷地温场差异性主要受盆地构造背景的控制,推测在断陷西北缘的伊47—伊45—伊8井区的深层是值得进一步钻探的有利目标区,该区发育较大规模的双一段低位扇砂体且其上覆优质烃源岩,成藏条件十分优越。更多还原

【Abstract】 Based on the systematical collection of the formation temperature data of exploration wells and the calculation of the geothermal gradient,the burial depth prediction model of the base rock in Moliqing fault depression is constructed,and the hydrocarbon generation threshold depth of hydrocarbon source rock of the secondary tectonic units in the fault depression is calculated,and the distribution range of the effective source rocks is predicted. The research result reveals that the geothermal field is controlled mainly by the tectonic background in Moliqing fault depression,and the deep strata in Y47-Y45-Y18 wellblock which is close to the northwest margin of Moliqing fault depression is a favorable target for the next drilling exploration. There exist large scale lowstand fan sandstones of the first member in Shuangyang formation and high-quality hydrocarbon source rock overlaying on the lowstand fan sandstones. So there are good hydrocarbon accumulation conditions in Moliqing fault depression.更多还原