白音查干凹陷腾格尔组储层物性控制因素分析

 针对白音查干凹陷储层研究的薄弱环节，应用储层地质学理论及方法，依据岩心、录井、测井和分析化验资料，对白音查干凹陷主力油层下白垩统腾格尔组储层的岩石学特征、孔隙类型、孔隙结构以及物性特征进行分析，研究了储层物性的控制因素。结果表明，腾格尔组储层物性的优劣明显受控于沉积相带的展布，优质储层物性发育于扇三角洲前缘、辫状河三角洲前缘亚相中的河口坝微相、水下分流河道微相、远砂坝微相等沉积相带；成岩作用是控制腾格尔组储层物性的次要因素，其中压实作用使储层物性变差明显，胶结作用的影响表现为双重性，而溶蚀作用具有建设性。研究揭示，优质储层分布与有利沉积相带展布具有较高的一致性。

Controlling Factors on the Reservoir’s Physical Property in the Tengger Formation of Baiyingchagan Sag

The main controlling factors on reservoir's physical properties are the bottleneck in the oilfield development in Baiyingchagan Sag. With respect to the Tengger formation, the major reservoir in the lower cretaceous system, on the basis of the related theory and the method of the reservoir geology, by using core logging, well logging and testing data, the petrological characteristics, the pore types, the pore structure and the physical characteristics are studied, and its main controlling factors are revealed. It is indicated that the reservoir physical properties are obviously controlled by the distribution of sedimentary facies, especially, the microfacies, the high quality reservoirs would distribute along the debouch bar microfacies, the underwater distributary channel microfacies, the sand dam within the fan-delta front and the braided river delta front. Moreover, the diagenetic reformation is the secondary controlling factor for the reservoir physical property of Tengger formation, among which the compaction has an obvious effect to cause a poor physical property, the cementation is responsible for the dualism effect, and the dissolution plays a constructive role. Finally, it is revealed that the high quality reservoir distribution and the favorable sedimentary facies belt distribution are closely related with each other.