萨东过渡带400米地区高含水后期调整挖潜技术研究
摘要
大庆油田目前已经进入高含水后期开发阶段,在油田综合含水率高、采出程度高和剩余可采储量采油速度高的情况下,油田开发稳产难度明显加大。为实现“十一五”及以后萨南开发区增加可采储量5000×104t的目标,有必要探索高含水后期进一步提高采收率的方法。萨东过渡带400米地区在2001年开辟了二次加密调整试验区,表明在一条带及部分井区有二次加密调整的潜力。从目前开采状况看,区块主要存在以下问题:一是区块已进入特高含水开采阶段,给今后挖潜带来了相当大的难度;二是水驱控制程度低,已投入开发的薄油层和表外层动用状况差;三是过渡带地区的原油粘度大,薄油层和表外层动用难度大;四是油水井关井多,开井率低,区块整体供液能力差,造成低产高含水关井井数较多;五是该地区油层钻遇厚度小,剩余油厚度较小且分布不均匀,挖潜难度大。为改善区块的开发效果,考虑对该区进行以加密调整、注采系统调整及老井综合利用相结合等方式对区块进行综合挖潜,提高区块的开井率及采油速度,达到进一步提高采收率的目标。
本文通过研究该地区高含水后期油层动用状况及剩余油分布特点、加密调整对象及可调厚度界限的合理确定、二次加密井网如何与原井网及一次加密井网合理衔接、提高新布井产能的方法、落实加密调整井投产初期产能和含水等指标、该地区部署水平井的可行性并设计方案、四条带地区如何完善单砂体注采关系,确定了加密调整的布井方式、调整厚度及区块综合治理的挖潜措施:在精细地质研究搞清剩余油分布的基础上,确定加密调整对象及可调厚度,落实加密调整潜力;不同布井方式下加密调整井主要开发指标预测,多方案的优化;区块综合治理方案的主要开发指标预测及方案优化;区块加密调整及综合治理效果的综合评价;研究该地区部署水平井的可行性并设计方案。
Daqing oil field has stepped into the high water-cut period, under the conditions of high general water-cut, high recovery percent, high available residual reserve and high production rate, the difficulty of stable production increased obviously. To fulfill the goal of the“Eleventh Five-Year Plan”and to increase the available reserve of Sanan development area to 5000×104t, it is necessary to explore new methods in further increasing the recovery ratio in high water-cut anaphase. In the 400-meter area of Sadong transitional zone, a regulation test site of second infill wells was conducted in 2001, the results show that there are potentials for second infillers in this area. From the present producing conditions, it can be seen that there are some problems in this area: 1st, in ultra-high water-cut period, the capability of future developing is very difficult; 2nd, the swept volume of water flooding is low, the sweepout conditions of oil sheets and untabulated reservoirs in producing are bad; 3rd, the viscosity of crude oil in this transitional zone is high, the production of the oil sheets and untabulated reservoirs are difficult; 4th, the closed wells are excessive, the ratio of opened wells is low, the overall feed flow in this area is limited, so there are more wells closed because of low output and high water content; 5th, the penetrated thickness is small in this area, the thickness of residual oil is thin and the distribution is uneven, it is difficult in seeking the potentials. In order to improve the producing conditions in this area, regulations of infill wells, injection-production system and the general utilization of old wells are considered to develop the potentials of the area, to increase the ratio of opened wells and production rate, and to further increase the recovery ratio.
Through the studies in the sweepout and residual oil distribution of this area in high water-cut anaphase, the determination of infill regulations and adjustable thickness limit, the methods in connecting the second infill wells with the first infill wells, and the studies in increasing the productivities of new deployed wells, setting the indexes of the productivity, water-cut in the early period of production, the possibility of deploying horizontal wells, and how to consummate the injection- production relations of the single sand-body in four transition region, the pattern configuration of infill regulation, the adjustment of thickness and the general management of this area are confirmed: To determine the infill regulation objects, the adjustable thickness and the potentials of infill regulation based on the fine geologic research which provides the residual oil distribution; To predict the primary development indexes of infill wells with different pattern configurations, then optimize the development plans; To predict and optimize the primary development indexes of general management and infill regulation in this area; To generally evaluate the infill regulation and integrated management, study the possibility of deploying horizontal wells then offer the plans in this area.
本文通过研究该地区高含水后期油层动用状况及剩余油分布特点、加密调整对象及可调厚度界限的合理确定、二次加密井网如何与原井网及一次加密井网合理衔接、提高新布井产能的方法、落实加密调整井投产初期产能和含水等指标、该地区部署水平井的可行性并设计方案、四条带地区如何完善单砂体注采关系,确定了加密调整的布井方式、调整厚度及区块综合治理的挖潜措施:在精细地质研究搞清剩余油分布的基础上,确定加密调整对象及可调厚度,落实加密调整潜力;不同布井方式下加密调整井主要开发指标预测,多方案的优化;区块综合治理方案的主要开发指标预测及方案优化;区块加密调整及综合治理效果的综合评价;研究该地区部署水平井的可行性并设计方案。
Daqing oil field has stepped into the high water-cut period, under the conditions of high general water-cut, high recovery percent, high available residual reserve and high production rate, the difficulty of stable production increased obviously. To fulfill the goal of the“Eleventh Five-Year Plan”and to increase the available reserve of Sanan development area to 5000×104t, it is necessary to explore new methods in further increasing the recovery ratio in high water-cut anaphase. In the 400-meter area of Sadong transitional zone, a regulation test site of second infill wells was conducted in 2001, the results show that there are potentials for second infillers in this area. From the present producing conditions, it can be seen that there are some problems in this area: 1st, in ultra-high water-cut period, the capability of future developing is very difficult; 2nd, the swept volume of water flooding is low, the sweepout conditions of oil sheets and untabulated reservoirs in producing are bad; 3rd, the viscosity of crude oil in this transitional zone is high, the production of the oil sheets and untabulated reservoirs are difficult; 4th, the closed wells are excessive, the ratio of opened wells is low, the overall feed flow in this area is limited, so there are more wells closed because of low output and high water content; 5th, the penetrated thickness is small in this area, the thickness of residual oil is thin and the distribution is uneven, it is difficult in seeking the potentials. In order to improve the producing conditions in this area, regulations of infill wells, injection-production system and the general utilization of old wells are considered to develop the potentials of the area, to increase the ratio of opened wells and production rate, and to further increase the recovery ratio.
Through the studies in the sweepout and residual oil distribution of this area in high water-cut anaphase, the determination of infill regulations and adjustable thickness limit, the methods in connecting the second infill wells with the first infill wells, and the studies in increasing the productivities of new deployed wells, setting the indexes of the productivity, water-cut in the early period of production, the possibility of deploying horizontal wells, and how to consummate the injection- production relations of the single sand-body in four transition region, the pattern configuration of infill regulation, the adjustment of thickness and the general management of this area are confirmed: To determine the infill regulation objects, the adjustable thickness and the potentials of infill regulation based on the fine geologic research which provides the residual oil distribution; To predict the primary development indexes of infill wells with different pattern configurations, then optimize the development plans; To predict and optimize the primary development indexes of general management and infill regulation in this area; To generally evaluate the infill regulation and integrated management, study the possibility of deploying horizontal wells then offer the plans in this area.
引文
[1]俞启泰,关于剩余油研究的探讨,石油勘探与开发,1997,24(2)46-50
[2]陆建林等,高含水期油田剩余油分布研究,石油学报,2001,22(1)48-52
[3]张一伟,熊琦化.陆相油藏描述,石油工业出版社,1995
[4]齐与峰,剩余油分布和运动特点及挖潜措施间的最佳协同,石油学报,1993,14(1):55-65
[5]于红文,高含水后期不同类型油层剩余油分布特征,大庆石油管理局,1991
[6]韩大匡,深度开发高含水油田提高采收率问题的探讨,石油勘探与开发,1995,22(5):47-55
[7]裘怿楠,陈子琪.油藏描述,石油工业出版社,1995
[8]付国民,李永军等.特高含水期扇三角洲储集层剩余油分布及挖潜途径,成都理工大学学报,2003,30(2):178-182
[9]吴云桐,刘志萍等.河68断块特高含水期剩余油分布研究与应用,西安石油学院学报(自然科学版),2003, 18(5):31-34
[10]王桂成、林燕等.《强非均质断块油田的稳产技术》,大庆石油地质与开发,2001,20(6):32-33
[11]徐安娜、江同文.《轮南油田中高含水期稳产技术研究与实践》,石油勘探与开发,2002, 29(1):112-114
[12]马玉霞.《双河油田IV1-3层系剩余油综合挖潜对策与应用》,河南石油(增刊),2003,23:27-33
[13]赵淑霞,谢绍敏等.《梁家楼油田特高含水期提高采收率技术研究与实践》,断块油气田, 2003,10(4):37-39
[14]王翠英,席天得等.《三维地质模型在濮城油田的应用》,断块油气田,2003,10(2):27-29
[15]隋军,吕晓光,赵翰卿等.大庆油田河流-三角洲相储层研究.北京:石油工业出版社,2000. 455
[16]刘丁曾,李伯虎等.大庆萨葡油层多层砂岩油藏.北京:石油工业出版社,1997.374
[17]王宾玉,张军,贾忠盛.大庆油田聚合物驱油工业化推广应用研究[J].石油勘探与开发,1997(6): 62～64
[18]王德民.大庆油田聚合物驱工业化推广结果及几点认识,SPE50928. 23～36
[19]姜言里等.聚合物驱油最佳技术条件优选.北京:石油工业出版社,1994.122～134
[20]美〕W·利特马恩.聚合物驱油.北京:石油工业出版社,1991.655 [21]徐正顺,王冬梅,陈福明等.大庆油田聚合物驱潜力评价[J].大庆石油地质与开发,2001(2):22～29
[22]马世煜.聚合物驱油实用工程方法.北京:石油工业出版社,1995.454～458 [37]王德民,程杰成,杨清彦.粘弹性聚合物溶液提高微观驱油效率的机理研究[J].石油学报,2000,21(5):45～51
[23]王德民,程杰成,杨清彦.粘弹性聚合物溶液提高微观驱油效率的机理研究[J].石油学报,2000,21(5):45～51
[24]曾文冲.油气藏储集层测井评价技术.北京:石油工业出版社,1991.7
[25]吕晓光,田东辉,李伯虎.厚油层平面宏观非均质性及挖潜方法的探讨[J].石油勘探与开发,1993,20(4):58-63.
[26]张红薇,赵翰卿,麻成斗.泛滥-分流平原相储层中河间砂体的精细描述[J].大庆石油地质与开发,1998,17(6):22-24.
[27]撒利明,王天琦,师永民,等.油田开发中后期岩相单元的细分研究[J].沉积学报,2002,20(4):595-599.
[28]宋保全,李音,席国兴,等.储层精细描述技术在杏北油田开发调整中的应用[J].石油学报,2001,22(1):72-77.
[29]夏位荣,张占峰,程时清.油气田开发地质学[M].北京:石油工业出版社,1999.
[30]Qiu Yinan.Fluvial Sandstone Bodies as Hydrocarbon Reservoirs in Lake Basins,Recent Developments in Fluvial Sedimentology[J].SEPM,1987,39:329-342.
[31]吕晓光,赵翰卿,付志国,等.河流相储层平面连续性精细描述[J].石油学报,1997,18(2):66-71.
[32]裘亦楠.储层沉积学研究工作流程[J].石油勘探与开发,1990,17(1):85-90.
[33]赵翰卿.大庆油田河流-三角洲沉积的油层对比方法[J].大庆石油地质与开发,1988,7(4):25-31.
[34]马利民,齐玉柱,高尔双.北三区主力油层精细地质研究及剩余油分布探讨[J].大庆石油地质与开发
[2]陆建林等,高含水期油田剩余油分布研究,石油学报,2001,22(1)48-52
[3]张一伟,熊琦化.陆相油藏描述,石油工业出版社,1995
[4]齐与峰,剩余油分布和运动特点及挖潜措施间的最佳协同,石油学报,1993,14(1):55-65
[5]于红文,高含水后期不同类型油层剩余油分布特征,大庆石油管理局,1991
[6]韩大匡,深度开发高含水油田提高采收率问题的探讨,石油勘探与开发,1995,22(5):47-55
[7]裘怿楠,陈子琪.油藏描述,石油工业出版社,1995
[8]付国民,李永军等.特高含水期扇三角洲储集层剩余油分布及挖潜途径,成都理工大学学报,2003,30(2):178-182
[9]吴云桐,刘志萍等.河68断块特高含水期剩余油分布研究与应用,西安石油学院学报(自然科学版),2003, 18(5):31-34
[10]王桂成、林燕等.《强非均质断块油田的稳产技术》,大庆石油地质与开发,2001,20(6):32-33
[11]徐安娜、江同文.《轮南油田中高含水期稳产技术研究与实践》,石油勘探与开发,2002, 29(1):112-114
[12]马玉霞.《双河油田IV1-3层系剩余油综合挖潜对策与应用》,河南石油(增刊),2003,23:27-33
[13]赵淑霞,谢绍敏等.《梁家楼油田特高含水期提高采收率技术研究与实践》,断块油气田, 2003,10(4):37-39
[14]王翠英,席天得等.《三维地质模型在濮城油田的应用》,断块油气田,2003,10(2):27-29
[15]隋军,吕晓光,赵翰卿等.大庆油田河流-三角洲相储层研究.北京:石油工业出版社,2000. 455
[16]刘丁曾,李伯虎等.大庆萨葡油层多层砂岩油藏.北京:石油工业出版社,1997.374
[17]王宾玉,张军,贾忠盛.大庆油田聚合物驱油工业化推广应用研究[J].石油勘探与开发,1997(6): 62～64
[18]王德民.大庆油田聚合物驱工业化推广结果及几点认识,SPE50928. 23～36
[19]姜言里等.聚合物驱油最佳技术条件优选.北京:石油工业出版社,1994.122～134
[20]美〕W·利特马恩.聚合物驱油.北京:石油工业出版社,1991.655 [21]徐正顺,王冬梅,陈福明等.大庆油田聚合物驱潜力评价[J].大庆石油地质与开发,2001(2):22～29
[22]马世煜.聚合物驱油实用工程方法.北京:石油工业出版社,1995.454～458 [37]王德民,程杰成,杨清彦.粘弹性聚合物溶液提高微观驱油效率的机理研究[J].石油学报,2000,21(5):45～51
[23]王德民,程杰成,杨清彦.粘弹性聚合物溶液提高微观驱油效率的机理研究[J].石油学报,2000,21(5):45～51
[24]曾文冲.油气藏储集层测井评价技术.北京:石油工业出版社,1991.7
[25]吕晓光,田东辉,李伯虎.厚油层平面宏观非均质性及挖潜方法的探讨[J].石油勘探与开发,1993,20(4):58-63.
[26]张红薇,赵翰卿,麻成斗.泛滥-分流平原相储层中河间砂体的精细描述[J].大庆石油地质与开发,1998,17(6):22-24.
[27]撒利明,王天琦,师永民,等.油田开发中后期岩相单元的细分研究[J].沉积学报,2002,20(4):595-599.
[28]宋保全,李音,席国兴,等.储层精细描述技术在杏北油田开发调整中的应用[J].石油学报,2001,22(1):72-77.
[29]夏位荣,张占峰,程时清.油气田开发地质学[M].北京:石油工业出版社,1999.
[30]Qiu Yinan.Fluvial Sandstone Bodies as Hydrocarbon Reservoirs in Lake Basins,Recent Developments in Fluvial Sedimentology[J].SEPM,1987,39:329-342.
[31]吕晓光,赵翰卿,付志国,等.河流相储层平面连续性精细描述[J].石油学报,1997,18(2):66-71.
[32]裘亦楠.储层沉积学研究工作流程[J].石油勘探与开发,1990,17(1):85-90.
[33]赵翰卿.大庆油田河流-三角洲沉积的油层对比方法[J].大庆石油地质与开发,1988,7(4):25-31.
[34]马利民,齐玉柱,高尔双.北三区主力油层精细地质研究及剩余油分布探讨[J].大庆石油地质与开发