科技创新导报
科技創新導報
과기창신도보
SCIENCE AND TECHNOLOGY CONSULTING HERALD
2014年
10期
40-42
,共3页
海上油田%薄散弱油藏%地层自流注水%多底多分支水平井
海上油田%薄散弱油藏%地層自流註水%多底多分支水平井
해상유전%박산약유장%지층자류주수%다저다분지수평정
Offshore oil field%thin-scattered-weak oil reservoir%Formation water dumping injection%Multi-underground and multi-branch horizontal wells
海上“薄散弱”油藏由于其油层薄、砂体小、分布零散、天然能量弱，大多难以经济有效开发。该文通过井震结合韵律层细分对比技术建立等时地层格架，储层沉积学研究确定砂体成因类型，并利用叠前纵横波联合反演、定量地质知识库、地质统计学等方法对储层的空间展布进行了精细刻画并运用相约束下三维地质建模技术对其进行定量表征。在储层精细描述的基础上，提出并实践了地层自流注水开发和多底多分支水平井开发技术。实践表明，相对于定向井衰竭式开发，单井日产量可提高11倍，采收率约可提高20个百分点，开发效果得到明显改善，这为海上“薄散弱”油藏及类似难动用储量的经济有效开发提供了一条新的途径。
海上“薄散弱”油藏由于其油層薄、砂體小、分佈零散、天然能量弱，大多難以經濟有效開髮。該文通過井震結閤韻律層細分對比技術建立等時地層格架，儲層沉積學研究確定砂體成因類型，併利用疊前縱橫波聯閤反縯、定量地質知識庫、地質統計學等方法對儲層的空間展佈進行瞭精細刻畫併運用相約束下三維地質建模技術對其進行定量錶徵。在儲層精細描述的基礎上，提齣併實踐瞭地層自流註水開髮和多底多分支水平井開髮技術。實踐錶明，相對于定嚮井衰竭式開髮，單井日產量可提高11倍，採收率約可提高20箇百分點，開髮效果得到明顯改善，這為海上“薄散弱”油藏及類似難動用儲量的經濟有效開髮提供瞭一條新的途徑。
해상“박산약”유장유우기유층박、사체소、분포령산、천연능량약，대다난이경제유효개발。해문통과정진결합운률층세분대비기술건립등시지층격가，저층침적학연구학정사체성인류형，병이용첩전종횡파연합반연、정량지질지식고、지질통계학등방법대저층적공간전포진행료정세각화병운용상약속하삼유지질건모기술대기진행정량표정。재저층정세묘술적기출상，제출병실천료지층자류주수개발화다저다분지수평정개발기술。실천표명，상대우정향정쇠갈식개발，단정일산량가제고11배，채수솔약가제고20개백분점，개발효과득도명현개선，저위해상“박산약”유장급유사난동용저량적경제유효개발제공료일조신적도경。
Due to thin oil reservoir layers,small sand bodies, scattered distribution and weak natural energy, most of the“thin-scattered-weak”offshore oil fields are difficult to develop economically and effectively.This essay is based on well seismic integrateing with rhythmic segmentation contrast technology to establish the isochronous stratigraphic framework, reservoir sedimentology researches to determine the genetic types of sandbodies,by applying prestack joint inversion of P-wave and S-wave, quantitative knowledge base and geostatistics method to describe the spatial distribution of reservoir and utilizing phase constraint of three digital geological modeling technology to carry on the quantitative characterization. On the basis of reservoir fine description,this essay proposed and practiced the formation water dumping injection and multi-underground and multi-branch horizontal wells technology. Practice shows that compared with the directional well of depletion development, single well daily production can improve the 11 times,recovery efficiency can be increased by 20%,improved development effect dramatically,which provides a new effective way to economically and effectively develop the“thin-scattered-weak”oil reservoirs on offshore and similar difficult producing reserves.
