石化技术
石化技術
석화기술
Petrochemical Industry Technology
2015年
9期
167-168,171
,共3页
沈桂川%魏江伟%蒲三龙%张进科
瀋桂川%魏江偉%蒲三龍%張進科
침계천%위강위%포삼룡%장진과
低渗透油藏%前置酸%酸蚀多缝体积%压裂改造技术
低滲透油藏%前置痠%痠蝕多縫體積%壓裂改造技術
저삼투유장%전치산%산식다봉체적%압렬개조기술
low permeability reservoirs%prepositioned acid%acid corrosion fractures volume%fracturing technology
姬塬油田属特低渗透性油田,储层渗透率低,由储层基质向裂缝壁面的渗流能力差.在油层改造中虽然采取了多种酸化、压裂增产措施,但措施效果不理想,产能恢复慢,有效期短,很难达到预期的增产效果.前置酸压裂多缝体积改造技术在老井油层改造中可实现对近井地层、裂缝壁面、远端裂缝周围地层进行深部解堵处理,且在大排量挤酸的过程中通过溶蚀作用可以开启地层微裂缝,形成新的产油通道.挤酸关井反应后对储层压裂改造,在扩大裂缝规模的同时,将酸溶蚀开启的微裂缝填砂延伸,实现对油层的体积改造目标,并取得了比较好的增产效果.
姬塬油田屬特低滲透性油田,儲層滲透率低,由儲層基質嚮裂縫壁麵的滲流能力差.在油層改造中雖然採取瞭多種痠化、壓裂增產措施,但措施效果不理想,產能恢複慢,有效期短,很難達到預期的增產效果.前置痠壓裂多縫體積改造技術在老井油層改造中可實現對近井地層、裂縫壁麵、遠耑裂縫週圍地層進行深部解堵處理,且在大排量擠痠的過程中通過溶蝕作用可以開啟地層微裂縫,形成新的產油通道.擠痠關井反應後對儲層壓裂改造,在擴大裂縫規模的同時,將痠溶蝕開啟的微裂縫填砂延伸,實現對油層的體積改造目標,併取得瞭比較好的增產效果.
희원유전속특저삼투성유전,저층삼투솔저,유저층기질향렬봉벽면적삼류능력차.재유층개조중수연채취료다충산화、압렬증산조시,단조시효과불이상,산능회복만,유효기단,흔난체도예기적증산효과.전치산압렬다봉체적개조기술재로정유층개조중가실현대근정지층、렬봉벽면、원단렬봉주위지층진행심부해도처리,차재대배량제산적과정중통과용식작용가이개계지층미렬봉,형성신적산유통도.제산관정반응후대저층압렬개조,재확대렬봉규모적동시,장산용식개계적미렬봉전사연신,실현대유층적체적개조목표,병취득료비교호적증산효과.
Jiyuan oilfield as an ultra-low permeability oilfield features low permeability and seepage ability of substratum to fracture surface,which leads to the low efficiency of acidification and fracturing measures in improving the output,such as slow capacity recovery and short validity.Prepositioned acid fracturing is developed to break down the blocking in old wells reservoir with respect to the near wellbore formation,fracture surface and formations surrounding the far fractures.It can open formation micro cracks during the large displacement of acid squeezing by dissolution and form new oil channel.After acid squeeze shut-in reaction the reservoir fracturing is modified by enlarging the scale of fracture and filling sand in the micro-fractures to improve the volume and output of the reservoir.