苏里格西部石盒8段产气、产水井储层特征对比

Comparison of Reservoir Characteristics of Gas and Water Production Wells in Shihe8 Section of Western Surige Area

苏里格西部盒8段致密砂岩气藏储层气水分布关系复杂,单一产水井较少,产水井主要表现为气水同产,明确产水因素这一研究对苏里格地区合理开发具有重要的指导意义。本文通过测井资料、分析化验资料以及试气资料,对苏西盒8段产水、气水同产、产气井的储层特征进行了对比研究。结果显示,研究区产气井的孔隙度和渗透率与气产量呈正相关,而产水井分布广与物性关系不大,主要分布在生烃强度低的地区。研究表明,生烃强度的强弱控制了产气、产水井的分布,产水的原因是储层孔隙致密,胶结物发育,孔隙结构复杂,孔喉半径小,在生烃强度较低的地区,源储压差小,由于毛细管阻力使气驱水不彻底而产水。

The gas-water distribution of tight sandstone gas reservoir in Western Sulige block 8 is complex, and there are few single water-producing wells. Water-producing wells are mainly characterized by gas-water co-production. The study of defining water-producing factors has important guiding significance for the rational development of Sulige area. Through logging data, analysis of laboratory data and gas testing data, this paper makes a comparative study on reservoir characteristics of water-producing, gas-water co-producing and gas-producing wells in Section 8 of Suxi Box. The results show that the porosity and permeability of gas producing wells in the study area are positively correlated with gas production, while the distribution of water producing wells is widely related to physical properties, mainly in areas with low hydrocarbon generation intensity. The results show that the intensity of hydrocarbon generation controls the distribution of gas and water producing wells. The reasons for water production are tight reservoir pore, well-developed cements, complex pore structure, small pore throat radius, small pressure difference between source and reservoir in areas with low hydrocarbon generation intensity, and incomplete water production due to capillary resistance.