摘要
在海塔盆地W次凹铜钵庙组砂砾岩储层发现了多口高产井,但井间试油产量差异大,试验区开发效果较差。为明确砂砾岩储层主控因素,预测优质储层展布,通过对比开发效果较好的T凹陷铜钵庙组砂砾岩储层岩石类型、孔隙发育特征的差异,明确了次生孔隙发育程度是影响两个油田生产效果差异的主要原因,厘清了影响物性的次生孔隙发育的影响因素。研究认为,沉积类型、岩石特征、成岩阶段、酸碱性流体以及不整合淋滤是控制次生孔隙发育的主要因素。建立了铜钵庙组砂砾岩储层次生溶蚀经历不整合淋滤、有机酸溶蚀、碱性地层水等多轮次的成因模式。明确了在铜钵庙时期满盆含砂背景下砂砾岩储集空间的演化历程,落实了在剥蚀不整合之下、环洼槽近源背景的近断裂带及斜坡隆起区为次生孔隙发育带。
In recent years,many high-yield wells have been found in glutenite reservoir of Tongbomiao formation in W subsag of Haita Basin.But there is great difference in oil test production of exploration and evaluation wells,and the development effect of the test area is poor.In order to determine the main controlling factors of physical properties of the glutenite reservoir and predict the distribution of high quality reservoirs,by comparing the rock types and pore development characteristics of the glutenite reservoirs of Tongbomiao Formation in T sag,it is concluded that the development degree of secondary pores is the main factor affecting the development effect.Sedimentary type,rock characteristics,diagenetic stage,acid/alkaline fluid and unconformity leaching are the main factors controlling the development of secondary pores.The glutenite reservoir of Tongbomiao Formation has experienced many cycles of unconformaity leaching,organic acid dissolution,alkaline formation water dissolution and other secondary dissolution processes.The evolution of the reservoir space of the glutenite under the sand-bearing background of Haita Basin in Tongbomiao period is clarified,and the near fault zone and the slope uplift areas are determined as the secondary pore development zones under the background of annular trough near source and denudation unconformity.
作者
南金浩
刘少然
孙贻铃
孔凡顺
于东旭
林彤
NAN Jinhao;LIU Shaoran;SUN Yiling;KONG Fanshun;YU Dongxu;LIN Tong(Exploration and Development Research Institute,PetroChina Daqing Oilfield Company,Daqing,Heilongjiang 163712,China;Oil Production Technology Institute,PetroChina Daqing Oilfield Company,Daqing,Heilongjiang 163453,China)
出处
《西安石油大学学报（自然科学版）》
北大核心
2024年第1期12-22,共11页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家科技重大专项课题“大型岩性油气藏形成主控因素与有利区带评价”(2017ZX05001-002)。
关键词
砂砾岩储层
铜钵庙组
次生孔隙
成因模式
海塔盆地
glutenite reservoir
Tongbomiao formation
secondary pore
genetic mode
Haita Basin
