石油勘探与开发
石油勘探與開髮
석유감탐여개발
PETROLEUM EXPLORATION AND DEVELOPMENT
2009年
6期
743-748
,共6页
超稠油%井间剩余油%水平井%加密%提高采收率
超稠油%井間剩餘油%水平井%加密%提高採收率
초주유%정간잉여유%수평정%가밀%제고채수솔
super-heavy oil%remaining oil between wells%horizontal well%infill%enhanced oil recovery
为了挖潜辽河油田A块超稠油油藏井间剩余油,应用数值模拟软件描述了水平井有利部署区温度场、压力场及剩余油分布:蒸汽吞吐周期较高的生产井周围油层动用情况较好,油层温度高达190～210℃,但蒸汽加热的有效面积只在井筒周围20～30 m,井间仍然有大部分区域处于45～65℃的低温状态;由于蒸汽吞吐过程中的汽窜现象,部分井之间有热连通形成.动用最好的区域油层压力为3.00 MPa,一般在3.40～3.90 MPa.井间存在大量剩余油,剩余油饱和度大于50%.在兴Ⅲ、兴Ⅱ_2油层单层厚度大干5 m区域整体部署水平井30口,水平段长度250～400 m.模拟预测水平井蒸汽吞吐8周期后,平均单井累计产油25 220 t,油汽比0.42,采出程度为31.5%.与直井生产效果对比,加密水平井可以挖潜稠油油藏井问剩余油,提高该区块采收率.图5表3参10
為瞭挖潛遼河油田A塊超稠油油藏井間剩餘油,應用數值模擬軟件描述瞭水平井有利部署區溫度場、壓力場及剩餘油分佈:蒸汽吞吐週期較高的生產井週圍油層動用情況較好,油層溫度高達190～210℃,但蒸汽加熱的有效麵積隻在井筒週圍20～30 m,井間仍然有大部分區域處于45～65℃的低溫狀態;由于蒸汽吞吐過程中的汽竄現象,部分井之間有熱連通形成.動用最好的區域油層壓力為3.00 MPa,一般在3.40～3.90 MPa.井間存在大量剩餘油,剩餘油飽和度大于50%.在興Ⅲ、興Ⅱ_2油層單層厚度大榦5 m區域整體部署水平井30口,水平段長度250～400 m.模擬預測水平井蒸汽吞吐8週期後,平均單井纍計產油25 220 t,油汽比0.42,採齣程度為31.5%.與直井生產效果對比,加密水平井可以挖潛稠油油藏井問剩餘油,提高該區塊採收率.圖5錶3參10
위료알잠료하유전A괴초주유유장정간잉여유,응용수치모의연건묘술료수평정유리부서구온도장、압력장급잉여유분포:증기탄토주기교고적생산정주위유층동용정황교호,유층온도고체190～210℃,단증기가열적유효면적지재정통주위20～30 m,정간잉연유대부분구역처우45～65℃적저온상태;유우증기탄토과정중적기찬현상,부분정지간유열련통형성.동용최호적구역유층압력위3.00 MPa,일반재3.40～3.90 MPa.정간존재대량잉여유,잉여유포화도대우50%.재흥Ⅲ、흥Ⅱ_2유층단층후도대간5 m구역정체부서수평정30구,수평단장도250～400 m.모의예측수평정증기탄토8주기후,평균단정루계산유25 220 t,유기비0.42,채출정도위31.5%.여직정생산효과대비,가밀수평정가이알잠주유유장정문잉여유,제고해구괴채수솔.도5표3삼10
To excavate the remaining oil between the wells of super-heavy oil reservoirs in A Block of Liaohe Oilfield, the temperature field, pressure field and distribution of remaining oil are described by numerical simulation software where the horizontal wells were deployed. The employing degree is good around the production wells which have more steam stimulation cycles, the reservoir temperature attains .190-210℃, but the effective heating area around wellbore is 20-30 m, the majority region is still 45-65℃ between the wells. Because of steam channeling, the thermal channel is buildup between some wells. The reservoir pressure is 3.00 MPa where the employing degree is good, generally, 3. 40-3. 90 MPa. A large amount of remaining oil exists between the wells and the saturation of remaining oil is above 50%. Thirty horizontal wells are deployed in Ⅻ and Ⅻ_2 formations where the effective thickness of individual bed is more than 5 m. The length of horizontal section is 250 to 400m. According to the simulation, when the horizontal wells produce by eight steam stimulation cycles, the average cumulative oil production of a single horizontal well is 25 220 t, the oil-steam ratio is 0. 42 and the degree of recovery is 31.5%. Compared with vertical wells, the infill horizontal wells can enhance oil recovery.
