鄂尔多斯盆地低渗透气藏开发技术及开发前景
|
摘要
鄂尔多斯盆地拥有丰富的天然气资源,但是储层隐蔽性强、非均质性强,开发难度极大。"十一五"期间,中国石油长庆油田公司通过不断转变发展方式,着力推进技术攻关,探索形成了低渗透气藏效益开发建设模式,突破了水平井、致密储层改造等提高单井产量的关键技术,建成了年产天然气200×108m3以上的生产能力,实现了鄂尔多斯盆地低渗透气藏的经济有效开发。目前长庆油田未动用天然气储量规模达数万亿立方米,仍具有相当大的开发潜力,但是这些未动用储量主要赋存于多薄层致密砂岩储层中且气水关系复杂。为了实现对此类储量的经济有效开发,提出以提高单井产量、提高采收率、降低开发成本为目标,并加强以下5个方面技术攻关的工作思路:多薄层储层预测技术、气水层综合判识技术、水平井快速钻井及分段改造技术、直井多层改造技术、提高采收率技术。还展望了该盆地的天然气开发前景。
There is rich natural gas resources in the Ordos Basin,where the concealed reservoirs with strong heterogeneity will be a great challenge for the gas development.During the "Eleventh Five-Year Plan" of the PetroChina Changqing Oilfield Company,the development pattern has been adjusted accordingly;technical difficulties have been tackled;cost-effective exploitation of low-permeability gas reservoirs has achieved success,and the key technical bottlenecks have been eased in improving the per-well productivity by horizontal well technology and stimulation measures for tight gas reservoirs.As a result,the Changqing gas zone has obtained its annual gas production capacity of over 20 billion m3,which realizes the economic and highly effective development of low-permeability gas reservoirs in the Ordos Basin.However,the Changqing Oilfield Company has more than one trillion m3 of non-producing gas reserves to be exploited in tight sand reservoirs with multiple thin layers and with a complex gas-water relationship.To achieve the cost-effective development of such difficult-to-produce gas reserves,we present our main goals of enhancing the EOR and per-well productivity and reducing the development cost and also point out that technical problems should be solved in five aspects: forecast of gas reservoirs with multiple thin beds,comprehensive identification between gas and water layers,the ROP improvement in horizontal wells and multi-stage fracture treatment,multi-layer reservoir stimulation by vertical wells,and EOR enhancement.
There is rich natural gas resources in the Ordos Basin,where the concealed reservoirs with strong heterogeneity will be a great challenge for the gas development.During the "Eleventh Five-Year Plan" of the PetroChina Changqing Oilfield Company,the development pattern has been adjusted accordingly;technical difficulties have been tackled;cost-effective exploitation of low-permeability gas reservoirs has achieved success,and the key technical bottlenecks have been eased in improving the per-well productivity by horizontal well technology and stimulation measures for tight gas reservoirs.As a result,the Changqing gas zone has obtained its annual gas production capacity of over 20 billion m3,which realizes the economic and highly effective development of low-permeability gas reservoirs in the Ordos Basin.However,the Changqing Oilfield Company has more than one trillion m3 of non-producing gas reserves to be exploited in tight sand reservoirs with multiple thin layers and with a complex gas-water relationship.To achieve the cost-effective development of such difficult-to-produce gas reserves,we present our main goals of enhancing the EOR and per-well productivity and reducing the development cost and also point out that technical problems should be solved in five aspects: forecast of gas reservoirs with multiple thin beds,comprehensive identification between gas and water layers,the ROP improvement in horizontal wells and multi-stage fracture treatment,multi-layer reservoir stimulation by vertical wells,and EOR enhancement.
引文
[1]冉新权.长庆油气田开发建设中的工程管理创新[J].中国工程科学,2008,10(12):58-62.
[2]张明禄,张宗林,樊友宏,等.长庆气区低渗透气藏开发技术创新与管理创新[J].天然气工业,2009,29(3):1-4.
[3]史松群,张盟勃,程思检,等.苏里格气田全数字地震勘探技术及应用[J].中国石油勘探,2007(3):33-42.
[4]张海涛,时卓.苏里格气田储层含水特征与测井识别方法[J].吉林大学学报:地球科学版,2010,40(2):447-454.
[5]崔贵涛,金祥哲,董宏伟,等.苏里格气田桃7井区水平井斜井段和水平段适用钻井液体系[J].天然气工业,2011,31(3):66-69.
[6]赵占良,白建文,胡子见,等.苏里格气田薄产层水平井地质导向技术研究[J].钻采工艺,2010,33(4):10-12.
[7]李宪文,赵文轸.水力射孔射流压裂工艺在长庆油田的应用[J].石油钻采工艺,2008,30(4):67-70.
[8]杨富,邹国曙,马得华,等.苏里格气田苏平36-6-23井裸眼完井分段压裂技术[J].石油钻采工艺,2010,32(4):46-50.
[9]郑云川,陶建林,蒋玲玲,等.苏里格气田裸眼水平井分段压裂工艺技术及其应用[J].天然气工业,2010,30(12):44-47.
[10]徐勇,穆谦益,杨亚聪,等.长庆气区开发模式及地面配套工艺技术[J].天然气工业,2010,30(2):102-105.
[2]张明禄,张宗林,樊友宏,等.长庆气区低渗透气藏开发技术创新与管理创新[J].天然气工业,2009,29(3):1-4.
[3]史松群,张盟勃,程思检,等.苏里格气田全数字地震勘探技术及应用[J].中国石油勘探,2007(3):33-42.
[4]张海涛,时卓.苏里格气田储层含水特征与测井识别方法[J].吉林大学学报:地球科学版,2010,40(2):447-454.
[5]崔贵涛,金祥哲,董宏伟,等.苏里格气田桃7井区水平井斜井段和水平段适用钻井液体系[J].天然气工业,2011,31(3):66-69.
[6]赵占良,白建文,胡子见,等.苏里格气田薄产层水平井地质导向技术研究[J].钻采工艺,2010,33(4):10-12.
[7]李宪文,赵文轸.水力射孔射流压裂工艺在长庆油田的应用[J].石油钻采工艺,2008,30(4):67-70.
[8]杨富,邹国曙,马得华,等.苏里格气田苏平36-6-23井裸眼完井分段压裂技术[J].石油钻采工艺,2010,32(4):46-50.
[9]郑云川,陶建林,蒋玲玲,等.苏里格气田裸眼水平井分段压裂工艺技术及其应用[J].天然气工业,2010,30(12):44-47.
[10]徐勇,穆谦益,杨亚聪,等.长庆气区开发模式及地面配套工艺技术[J].天然气工业,2010,30(2):102-105.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心