中南大学学报（自然科学版）2018，Vol.49Issue(1)：141-149,9.DOI:10.11817/j.issn.1672-7207.2018.01.019
徐家围子断陷沙河子组致密砂砾岩气藏特征与资源潜力
Characteristic and resource potential of tight sandy conglomerate gas reservoir in Shahezi formation of Xujiaweizi Depression
摘要
Abstract
Accumulation rules and resource penitential of tight sandy conglomerate gas in the Lower Cretaceous Shahezi formation of the Xujiaweizi fault depression were discussed based on the practice of oil and gas drilling and comprehensive study of geological, geophysical and geochemical data. The results show that the source rocks widely distributed in the depression, with the long hydrocarbon generation period, high gas generation intensity and the high methane content in natural gas. Sandy conglomerates are low in maturity and highly compacted. The reservoir space type is mainly secondary dissolved pore, the reservoir contains gas generally, and the productivity is closely related to physical properties. The densification of reservoir occurred before the peak of gas generation, thus the reservoir forming model is'reservoir tight first and gas filled later". Natural gas filled continuously, with the one stage forming period and a "quasi-continuous" way. On the basis of gas reservoir study, three methods are used to predict the resource quantity of sandy conglomerate gas. Gas resource estimated by Volume-Monte Carlo method is about 0.16×1012 m3 (expected value). Gas resource estimated by resource abundance analogy method is abput 0.21×1012 m3. Gas resource estimated by genetic method is about 0.18×1012 m3. Average value of gas resource estimated form three methods is 0.18×1012 m3.关键词
致密/砂砾岩/储层/成藏/资源潜力/沙河子组/徐家围子断陷Key words
tight/sandy conglomerate/reservoir/gas accumulation/resource potential/Shahezi formation/Xujiaweizi depression分类
能源科技引用本文复制引用
陈海峰,王凤启,王民..徐家围子断陷沙河子组致密砂砾岩气藏特征与资源潜力[J].中南大学学报（自然科学版）,2018,49(1):141-149,9.基金项目
国家自然科学基金资助项目(41402110) （41402110）
中央高校基本科研业务费专项(14CX05017A) (Project(41402110) supported by the National Natural Science Foundation of China （14CX05017A）
Project(14CX05017A) supported by the Fundamental Research Funds for the Central Universities) （14CX05017A）
