油气藏评价与开发
油氣藏評價與開髮
유기장평개여개발
2014年
6期
34-38
,共5页
张娟%刘峰%师志虎%杨靖%王海莲
張娟%劉峰%師誌虎%楊靖%王海蓮
장연%류봉%사지호%양정%왕해련
双层完井排液%井下底水循环%气顶底水%水锥%临界产量
雙層完井排液%井下底水循環%氣頂底水%水錐%臨界產量
쌍층완정배액%정하저수순배%기정저수%수추%림계산량
down hole water sink(DWS)%down hole water loop(DWL)%gas cap and bottom water%water coning%critical production
气顶底水油藏是一种较难开发的油藏。针对油藏开发过程中，容易导致气体和底水锥进，降低油井临界产量，以前人提出的双层完井排液（DWS）和井下底水循环（DWL）技术为基础，根据气顶底水油藏中流体分布的特征，提出在储层中4个不同部位分别射孔，油气界面和油水界面分别安装1个封隔器，联合DWS和DWL技术进行开采的新方法。气体由气层射孔段通过油套环形空间采出，原油由油层射孔段通过油管采出，底水通过水层两个潜水泵在井筒和地层中形成循环。根据油气界面和油水界面压力平衡的原则，建立了合理的日采气，日采油和注排水速度计算公式。实例计算表明：新方法提高了油井临界产量，大约为原方法的1.52倍。该方法为气顶底水油藏的合理开发提供了新的理论参考。
氣頂底水油藏是一種較難開髮的油藏。針對油藏開髮過程中，容易導緻氣體和底水錐進，降低油井臨界產量，以前人提齣的雙層完井排液（DWS）和井下底水循環（DWL）技術為基礎，根據氣頂底水油藏中流體分佈的特徵，提齣在儲層中4箇不同部位分彆射孔，油氣界麵和油水界麵分彆安裝1箇封隔器，聯閤DWS和DWL技術進行開採的新方法。氣體由氣層射孔段通過油套環形空間採齣，原油由油層射孔段通過油管採齣，底水通過水層兩箇潛水泵在井筒和地層中形成循環。根據油氣界麵和油水界麵壓力平衡的原則，建立瞭閤理的日採氣，日採油和註排水速度計算公式。實例計算錶明：新方法提高瞭油井臨界產量，大約為原方法的1.52倍。該方法為氣頂底水油藏的閤理開髮提供瞭新的理論參攷。
기정저수유장시일충교난개발적유장。침대유장개발과정중，용역도치기체화저수추진，강저유정림계산량，이전인제출적쌍층완정배액（DWS）화정하저수순배（DWL）기술위기출，근거기정저수유장중류체분포적특정，제출재저층중4개불동부위분별사공，유기계면화유수계면분별안장1개봉격기，연합DWS화DWL기술진행개채적신방법。기체유기층사공단통과유투배형공간채출，원유유유층사공단통과유관채출，저수통과수층량개잠수빙재정통화지층중형성순배。근거유기계면화유수계면압력평형적원칙，건립료합리적일채기，일채유화주배수속도계산공식。실례계산표명：신방법제고료유정림계산량，대약위원방법적1.52배。해방법위기정저수유장적합리개발제공료신적이론삼고。
Gas cap oil reservoir with bottom water is one of the reservoirs difficult to be developed. During the reservoir develop?ment process, it is easy to hit gas coning and water coning which reduce the critical oil production. Therefore, based on DWS and DWL technology proposed by predecessors, and according to the fluid distribution, a new recovery method was proposed that is to shoot in 4 different parts in reservoir, separately install a packer in oil-gas interface and oil-water interface, and combine DWS with DWL. Gas is produced from the gas layer perforation through tubing casing annulus, crude oil is produced from oil perforating through tubing, and bottom water is circulated through two submersible pumps in the wellbore and formation. Based on the pressure balance principle of oil-gas interface and oil-water interface, reasonable formulas of daily gas production, daily oil production and water injection/drainage rate were established. The calculation of example showed that the results of the new method enhanced the critical production(1.52 times of the original method). This method provides new theory reference in reasonably developing the res?ervoir with gas cap and bottom water.
