CAJ | 학술논문

朱寨子油区的油气藏具有压力系数低、物性差、渗流能力低、孔喉微细、比表面积大和泥质含量高等特点，容易受到固相、液相、聚合物吸附、矿物敏感等伤害。分析了朱寨子油区储层伤害机理，提出了朱寨子油区储层钻井液保护技术，在钻井液中加入一定量的聚合物抑制剂和无机盐抑制剂，可有效防止储层中的敏感矿物因滤液入侵而引起的敏感性伤害；经粒径优化的架桥粒子和可软化变形的 ST-3按一定比例复配而成的复合暂堵剂，可以形成致密的泥饼以减少钻井液的侵入量和侵入深度；由两种表面活性剂复配组成的 H FR 可有效降低油/水界面张力而显著降低储层水锁损害的程度。有助于将侵入储层的液相返排出来，提高油相饱和度和渗透率，改善储层的渗流能力，最终提出两套钻井液保护技术。
주채자유구적유기장구유압력계수저、물성차、삼류능력저、공후미세、비표면적대화니질함량고등특점，용역수도고상、액상、취합물흡부、광물민감등상해。분석료주채자유구저층상해궤리，제출료주채자유구저층찬정액보호기술，재찬정액중가입일정량적취합물억제제화무궤염억제제，가유효방지저층중적민감광물인려액입침이인기적민감성상해；경립경우화적가교입자화가연화변형적 ST-3안일정비례복배이성적복합잠도제，가이형성치밀적니병이감소찬정액적침입량화침입심도；유량충표면활성제복배조성적 H FR 가유효강저유/수계면장력이현저강저저층수쇄손해적정도。유조우장침입저층적액상반배출래，제고유상포화도화삼투솔，개선저층적삼류능력，최종제출량투찬정액보호기술。
The Zhu-Zhaizi oilfield reservoir has the characteristics of low pressure coefficient,poor physical property,low permeability,micro-pore and micro-throat,large specific surface and high sand concentration.It is easily damaged by the solid phase matter,liquid phase matter,polymer adsorption and sensitive mineral content.On the base of analyses about Zhu-Zhaizi oilfield formation damage mechanism,this paper introduces a method of drilling fluid reservoir protection technology.That is filtrate invasion sensitive damage can be slightly inhibited caused by sensitive mineral content through adding some polymer inhibition and inorganic salts inhibition into drilling fluid.The temporary plugging agent is made by size optimized bridging particle and soften deformable ST-3 ,and it can reduce the amount of drilling fluid intrusion and invasion depth by forming a dense cake.HFR which is compounded by two kinds of surfactants can efficiently reduce oil-water interfacial tension and significantly reduce the damage degree of water block.It also can help to flow back the filtrate invasion liquid phrase,enhance the oil saturation and relative permeability,and improve the formation permeability.So,two methods of drilling fluid reservoir formation technologies are finally given.