裂缝性礁灰岩强底水油藏孔、缝、洞发育,底水能量供应充足,由于裂缝发育的非均质性及裂缝产状类型的多样化,油井水锥规律非常复杂,亟需发展有效的控水措施。以流花11-1油田为例,基于岩心描述、铸体薄片分析和扫描电镜实验结果对储层进...裂缝性礁灰岩强底水油藏孔、缝、洞发育,底水能量供应充足,由于裂缝发育的非均质性及裂缝产状类型的多样化,油井水锥规律非常复杂,亟需发展有效的控水措施。以流花11-1油田为例,基于岩心描述、铸体薄片分析和扫描电镜实验结果对储层进行分类,并建立不同储层机理模型,研究不同储层水平井水锥规律。在此基础上通过分析油井历史控堵水措施效果,针对性提出不同储层后期控堵水对策。研究结果表明,4类储层中致密裂缝型和孔洞裂缝型储层最易发生水锥,表现为油井见水快、含水率上升快、产量递减快;在现场已实施的3类控水措施中,“连续封隔体+流入控制装置(Inflow Control Device, ICD)”控水措施既能充填裂缝,又能降低高产能段流量,起到均衡控水的作用,现场应用效果最好。该项研究对于裂缝型底水油藏的高效开发具有重要意义,为该类油田的见水规律和控水对策提供借鉴。展开更多
In a very gentle platform-margin paleogeographic environment, platform-margin reef flat facies carbonate reservoir rocks were developed in the Changxing Formation of Yuanba field. Later weak structural evolution and d...In a very gentle platform-margin paleogeographic environment, platform-margin reef flat facies carbonate reservoir rocks were developed in the Changxing Formation of Yuanba field. Later weak structural evolution and diagenetic evolution caused the Changxing Formation to form lithologic traps, with good reservoirs such as dissolved bioclastic dolostone and dissolved pore dolostone. The Changxing Formation gas reservoir is a pseudo-layered porous lithologic gas reservoir under pressure depletion drive, with high H2S and moderate CO2 contents. This paper predictes that the conducting system for the Changxing Formation gas reservoir is possibly composed of the pores and microfractures in the Changxing Formation reservoir, the top erosional surface of the Changxing Formation, as well as the micropores and microfractures in the underlying formations. The Changxing Formation reservoir has experienced 3 hydrocarbon charging stages. This paper suggests that diffusion is the major formation mechanism for this gas reservoir. In the Middle and Late Yanshanian, the Yuanba area entered the major gas charging stage. The gas migrated mainly through diffusion and with the assistance of seepage flow in small faults and microfractures from the source rocks and the other oil-bearing strata to the Changxing Formation carbonate reservoir rocks, forming lithologic gas pools. In the Himalayan Epoch, the lithologic traps were uplifted as a whole without strong modification or overlapping, and were favorable for gas preservation.展开更多
针对底水能量充足、裂缝高度发育的礁灰岩油藏,在使用水平井开发的过程中出现含水上升快、开发效果差的问题。在现有控水工艺适应性和应用效果分析基础上,研究形成了包括采用配套研发的充填管柱实现裂缝过饱和充填、优选选择性控水颗粒...针对底水能量充足、裂缝高度发育的礁灰岩油藏,在使用水平井开发的过程中出现含水上升快、开发效果差的问题。在现有控水工艺适应性和应用效果分析基础上,研究形成了包括采用配套研发的充填管柱实现裂缝过饱和充填、优选选择性控水颗粒对水平井筒与井眼之间环空进行封隔和使用电动流入控制装置(Automatic Inflow Control Device,AICD)控水工具实现水平井分段自适应控水的水平井过饱和充填自适应控水技术。通过数值模拟软件形成控水工具优化设计方案并进行现场试验,现场试验表明该技术控水效果明显。该控水技术对裂缝型底水油藏的高效开发具有借鉴意义。展开更多
文摘裂缝性礁灰岩强底水油藏孔、缝、洞发育,底水能量供应充足,由于裂缝发育的非均质性及裂缝产状类型的多样化,油井水锥规律非常复杂,亟需发展有效的控水措施。以流花11-1油田为例,基于岩心描述、铸体薄片分析和扫描电镜实验结果对储层进行分类,并建立不同储层机理模型,研究不同储层水平井水锥规律。在此基础上通过分析油井历史控堵水措施效果,针对性提出不同储层后期控堵水对策。研究结果表明,4类储层中致密裂缝型和孔洞裂缝型储层最易发生水锥,表现为油井见水快、含水率上升快、产量递减快;在现场已实施的3类控水措施中,“连续封隔体+流入控制装置(Inflow Control Device, ICD)”控水措施既能充填裂缝,又能降低高产能段流量,起到均衡控水的作用,现场应用效果最好。该项研究对于裂缝型底水油藏的高效开发具有重要意义,为该类油田的见水规律和控水对策提供借鉴。
基金supported by the National Major Fundamental Research and Development project(No. 2005CB422100)the project of Southern Exploration Division Company,SINOPEC
文摘In a very gentle platform-margin paleogeographic environment, platform-margin reef flat facies carbonate reservoir rocks were developed in the Changxing Formation of Yuanba field. Later weak structural evolution and diagenetic evolution caused the Changxing Formation to form lithologic traps, with good reservoirs such as dissolved bioclastic dolostone and dissolved pore dolostone. The Changxing Formation gas reservoir is a pseudo-layered porous lithologic gas reservoir under pressure depletion drive, with high H2S and moderate CO2 contents. This paper predictes that the conducting system for the Changxing Formation gas reservoir is possibly composed of the pores and microfractures in the Changxing Formation reservoir, the top erosional surface of the Changxing Formation, as well as the micropores and microfractures in the underlying formations. The Changxing Formation reservoir has experienced 3 hydrocarbon charging stages. This paper suggests that diffusion is the major formation mechanism for this gas reservoir. In the Middle and Late Yanshanian, the Yuanba area entered the major gas charging stage. The gas migrated mainly through diffusion and with the assistance of seepage flow in small faults and microfractures from the source rocks and the other oil-bearing strata to the Changxing Formation carbonate reservoir rocks, forming lithologic gas pools. In the Himalayan Epoch, the lithologic traps were uplifted as a whole without strong modification or overlapping, and were favorable for gas preservation.
文摘针对底水能量充足、裂缝高度发育的礁灰岩油藏,在使用水平井开发的过程中出现含水上升快、开发效果差的问题。在现有控水工艺适应性和应用效果分析基础上,研究形成了包括采用配套研发的充填管柱实现裂缝过饱和充填、优选选择性控水颗粒对水平井筒与井眼之间环空进行封隔和使用电动流入控制装置(Automatic Inflow Control Device,AICD)控水工具实现水平井分段自适应控水的水平井过饱和充填自适应控水技术。通过数值模拟软件形成控水工具优化设计方案并进行现场试验,现场试验表明该技术控水效果明显。该控水技术对裂缝型底水油藏的高效开发具有借鉴意义。
