匡腊梅 邹信波

摘 要：海上油田的低渗油气藏因经济门槛产量限制，使传统储层改造工艺手段在海上油田应用受限。MRC（油藏最大接触位移）储层改造技术可以增加泄流面积，平衡油水流动，实现天然水驱范围的立体延伸，从而降低单井含水，延缓含水上升速度，提高特高含水老井井控范围剩余油资源利用程度。通过对MRC储层改造技术的不断创新及优化升级，成功将该项技术由单支井眼的位移分支改造向多分支井眼位移分支改造，从中低含水井改造向特高含水井改造，并进一步向MRC改造（MRC储层改造井二次MRC储层改造）发展。通过大修增产措施实现降水增油，极大地延长了低渗储层低产油井寿命，同时“短、平、快”上产的特点已使该项技术在海上油田挖潜领域实现工业化应用。

关键词：水平井;低渗储层;储层改造;悬空划槽

中图分类号：TE242 文献标识码：A 文章编号：1003-5168（2019）07-0142-05

Abstract： The application of traditional reservoir modification techniques in offshore oilfields is limited due to the economic threshold production restriction of low permeability reservoirs in offshore oilfields. MRC （maximum reservoir contact） reservoir modification technology can increase drainage area， balance oil and water flow， and realize three-dimensional extension of natural water drive range， thus reducing water cut of single well， delaying water cut rising speed， and improving the utilization degree of remaining oil resources in well control range of super high water cut old wells. Through continuous innovation and optimization and upgrading of MRC reservoir transformation technology， the technology has been successfully transformed from single well displacement branch to multi-branch well displacement branch， from medium and low water cut well to ultra-high water cut well， and further developed to MRC power transformation （MRC reservoir transformation well for reconstruction）. Through overhaul and stimulation measures， precipitation and oil production are increased， which greatly prolongs the life of low-yield oil wells in low permeability reservoirs. At the same time， the characteristics of “short， flat and fast” production have made the technology realize industrial application in the field of offshore oil field tapping potential.

Keywords： horizontal well; low permeability reservoir; reservoir transformation; suspended grooving

中國海上油田低渗储层油气资源，因工程、设施及开采设备投入差异导致经济门槛产量受到限制，使诸多传统储层改造措施工艺在海上油气田应用受限[1，2]。典型的如水力压裂技术是陆地油田应用广泛的储层改造措施，而南海东部海上油田普遍具有层位多、油水交互存在、水体大、能量充足等地下条件特点，导致压裂工艺应用受限，尤其是压裂后若形成垂向裂缝直接沟通油水层将带来灾难性后果，同时突破地面条件限制实现平台化压裂。南海东部海上油田边底水能量充足，采用天然能量开发，目前，老油田经过长期高速开发，采出程度高，剩余油分布零散且规模小，挖潜难度大，井间剩余油规模小，且井网密度较大，采用调整井挖潜经济效益风险高。……