石油化工应用
石油化工應用
석유화공응용
PETROCHEMICAL INDUSTRY APPLICATION
2012年
7期
1-6,13
,共7页
低渗透油藏%油层堵塞%油层解堵%现场应用%效果
低滲透油藏%油層堵塞%油層解堵%現場應用%效果
저삼투유장%유층도새%유층해도%현장응용%효과
low permeability reservoirs%formations choked%field formations choking solve%effect
长庆油田三叠系延长组储层渗透率0．96×10-3μm2-6．43×10-3μm2，粘土矿物中酸敏、水敏性物质含量较高，地层水矿化度高达119舡，部分油藏Ba2＋含量1200～2400mg/L。因储层孔隙喉道细小，注水开发中因粘土颗粒运移，原油乳化液、结蜡、结垢所导致的油层堵塞十分严重。几十年来，油田不断深入研究并大规模实施了多种形式的油层酸处理、油层清防垢、油层压裂等解堵技术。在所统计的151口油井酸处理施工中，平均单井增油量由早期的142t上升到近期的391t，在所统计的48口油井清防垢施工中，低渗透层油井平均单井增油量由早期的321t上升到近期的338t，在所统计的92口油井压裂施工中，平均单井增油量由早期的112t上升到近期的161t。最近研制的油层综合解堵体系，又将单井增油量进一步提高到944t。相比之下，综合解堵、酸处理和清防垢的解堵效果优于油层压裂。将油层挤注防垢剂工艺与油层压裂工艺或油层酸处理工艺组合作业，可大幅度提高油层解堵效果。
長慶油田三疊繫延長組儲層滲透率0．96×10-3μm2-6．43×10-3μm2，粘土礦物中痠敏、水敏性物質含量較高，地層水礦化度高達119舡，部分油藏Ba2＋含量1200～2400mg/L。因儲層孔隙喉道細小，註水開髮中因粘土顆粒運移，原油乳化液、結蠟、結垢所導緻的油層堵塞十分嚴重。幾十年來，油田不斷深入研究併大規模實施瞭多種形式的油層痠處理、油層清防垢、油層壓裂等解堵技術。在所統計的151口油井痠處理施工中，平均單井增油量由早期的142t上升到近期的391t，在所統計的48口油井清防垢施工中，低滲透層油井平均單井增油量由早期的321t上升到近期的338t，在所統計的92口油井壓裂施工中，平均單井增油量由早期的112t上升到近期的161t。最近研製的油層綜閤解堵體繫，又將單井增油量進一步提高到944t。相比之下，綜閤解堵、痠處理和清防垢的解堵效果優于油層壓裂。將油層擠註防垢劑工藝與油層壓裂工藝或油層痠處理工藝組閤作業，可大幅度提高油層解堵效果。
장경유전삼첩계연장조저층삼투솔0．96×10-3μm2-6．43×10-3μm2，점토광물중산민、수민성물질함량교고，지층수광화도고체119강，부분유장Ba2＋함량1200～2400mg/L。인저층공극후도세소，주수개발중인점토과립운이，원유유화액、결사、결구소도치적유층도새십분엄중。궤십년래，유전불단심입연구병대규모실시료다충형식적유층산처리、유층청방구、유층압렬등해도기술。재소통계적151구유정산처리시공중，평균단정증유량유조기적142t상승도근기적391t，재소통계적48구유정청방구시공중，저삼투층유정평균단정증유량유조기적321t상승도근기적338t，재소통계적92구유정압렬시공중，평균단정증유량유조기적112t상승도근기적161t。최근연제적유층종합해도체계，우장단정증유량진일보제고도944t。상비지하，종합해도、산처리화청방구적해도효과우우유층압렬。장유층제주방구제공예여유층압렬공예혹유층산처리공예조합작업，가대폭도제고유층해도효과。
The permeability of Triassic Yanchang formation in Changqing oilfield is 0.96×10-3μm2-6.43×10-3μm2.The formations have been choked by clay micrograins,wax,scales and emulsions. Three operation methods, such as the integration of operation by squeezing scale inhibitor and by squeezing scale remover, the operation by acidizing and the operation by fracturing, are used to formation choking solve.In the operation process of increasing the pro- duction for 151 producers by acidizing, the production increased to 391t/per producer. For 48 producers by squeezing scale inhibitor and by squeezing scale remover, the production in- creased to 338t/per producer. For 92 producers by fracturing, the production increased to 161t/per producer. The effect of acidizing and scale controlling is more obvious than that of fracturing. Recently,the choking solve tests are operated by squeezing the multifunction choking solve agent. It is shown that the production increased to 944t/per producer. Besides the integration of operation by fracturing and by squeezing scale inhibitor, the integration of operation by fracturing and by acidizing and the integration of operation by squeezing scale inhibitor and by squeezing scale remover are used to formation choking solve tests. The re- sult showed that the effect of the integration of operation by fracturing and by squeezing scale inhibitor is more obvious than that of other two methods.
