含油气盆地低渗透储层构造裂缝定量预测方法和实例

含油气盆地储层裂缝特征参数的定量表征和空间分布规律定量预测，仍是石油地质领域的前沿问题之一。低渗透储层的一个显著特点是不同程度上发育构造裂缝系统，是我国非常重要的油气储层类型,因此,开展低渗透储层构造裂缝分布规律的合理预测评价,无疑会对油气勘探与开发起到积极的指导作用。构造裂缝预测研究的基本方法有岩石破裂法、主曲率法、能量法、统计学方法。以鄂尔多斯盆地沿河湾探区为例，以统计法为基础，结合运用岩石破裂法和能量法,定量预测和评价了该探区上三叠统延长组主要目的层长6¹低渗透储层裂缝的分布和发育状况,为该探区油气的进一步勘探与开发提供了重要的地质依据。

METHODS FOR QUANTITATIVE PREDICTION OF TECTONIC FRACTURES IN COMPACT RESERVOIRS IN PETROLIFEROUS BASINS AND A CASE STUDY

The quantitative prediction and evaluation of spacial distributive law of tectonic fractures and the quantitative depiction of fracture parameters in reservoirs are still one of the frontier questions for petroleum geology. A noticeable characteristic of low permeable reservoirs, which has been one of very important oil-reservoir types in china, is the development of tectonic fracture system in various degrees. Therefore, there is no doubt that the appropriate quantitative prediction and evaluation of the distribution law for tectonic fractures play an active guidance role in oil exploration and development. Nowadays the basic methods of tectonic fractures prediction study are rock burst, main rate of curve, strain energy and statistics method. Taking the Yanhewan area in the Ordos basin as an example, based on the statistical method, rock burst method, and strain energy method, this paper makes the quantitative prediction and evaluation of the tectonic fracture distribution and development condition in the Chang 61 low permeable reservoir of the Upper Triassic Yanchang Formation, offering important geological reference for further oil exploration and development in the area.