CAJ | 학술논문

塔中西部奥陶系缝洞型油藏以溶洞、裂缝为主要的储运空间，储层缝洞体发育，主要储层类型有洞穴型、孔洞型、裂缝型、裂缝-孔洞型，储层非均质性强，流体分布关系复杂。采用油井见水特征曲线法，以塔中西部一些典型采油井为例，结合生产数据，分析了油井见水特征，将其见水特征分为4种类型：水锥型、层状型、裂缝型、条带型。通过对研究区典型井生产动态曲线分析认为，水锥型、层状型、裂缝型见水对于日产油量下降影响达到66％左右，而条带型见水对日产油量下降影响则相对较小，不足50％。经过对研究区出水井平均含水率变化统计，平均含水率值小于60％井居多，综合认为本区尚处于低-中含水阶段。结合见水类型、生产特征及各自储层类型，提出有针对性的措施，从而达到降水增油的开发效果。
탑중서부오도계봉동형유장이용동、렬봉위주요적저운공간，저층봉동체발육，주요저층류형유동혈형、공동형、렬봉형、렬봉-공동형，저층비균질성강，류체분포관계복잡。채용유정견수특정곡선법，이탑중서부일사전형채유정위례，결합생산수거，분석료유정견수특정，장기견수특정분위4충류형：수추형、층상형、렬봉형、조대형。통과대연구구전형정생산동태곡선분석인위，수추형、층상형、렬봉형견수대우일산유량하강영향체도66％좌우，이조대형견수대일산유량하강영향칙상대교소，불족50％。경과대연구구출수정평균함수솔변화통계，평균함수솔치소우60％정거다，종합인위본구상처우저-중함수계단。결합견수류형、생산특정급각자저층류형，제출유침대성적조시，종이체도강수증유적개발효과。
Fractured vuggy type reservoir in Ordovician reservoirs in the western Tazhong area is featured by the main reservoir spaces of cave and crack,and four types of reservoir can be subdivided:cave -type,pore -caven,fractured -type, and fractured -cavernous type.Taking some typical oil wells in the western Tazhong area as examples,combined with produc-tion data,this paper analyzes the water breakthrough characteristics by the characteristic curves.The water breakthrough char-acteristics include four types,i.e.water coning type,laminarization type,fractured type,and banding type.Based on the ana-lyses of the production performance curves of representative oil wells,it is considered that the decrease of daily oil production of wells with water breakthrough of water coning type,laminarization type and fractured type,can be up to about 66%,but the corresponding number is less than 50% in wells with water breakthrough of banding type.By the statistics of water -produ-cing wells in the study area,the average water -cut of major wells are less than 60%,which indicates this area is in low -middle water breakthrough period.With the combination of water breakthrough type,production characteristics and reservoir type,pertinent measures are proposed to be helpful to the exploitation effect of reducing water and increasing oil production.