超深高压气藏动态监测技术对策研究——以SY构造栖霞组气藏为例
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摘要
为了尽早提交SY构造二叠系栖霞组气藏探明储量,编制开发方案,以气藏整体的连通关系、气藏类型及气井产能监测方法和监测技术为研究对象,分析气藏动态监测难点,认为存在超深气井井下压力、温度监测难度大;气井产量调节不稳定,产能还需要核实;目前所获取的资料难以明确气藏整体连通性;气藏局部产水,气藏类型不明确等问题。针对问题进行对策研究,结果表明:(1)井筒参数计算模型+井下浅层低风险监测技术有利于后期开展动态监测工作,同时降低了操作成本;(2)井口变流量测试技术井口产量调节稳定,便于明确气井实际产能;(3)在构造高带内及高带间开展干扰试井及同时实施气体同位素示踪剂监测,能尽快明确气藏的整体连通性;(4)运用Stiff图版建立区内的水侵监测模型。结论认为:SY构造二叠系栖霞组气藏地质条件复杂,利用适宜的监测技术有助于认识气藏,科学、合理地开发气藏,推动气藏的开发进程,为提交探明储量奠定基础。
For the sake of submitting proved reserves of Xixia gas reservoirs in SY structure and drawing up a development scheme as early as possible, the whole connectivity, reservoir type, deliverability monitoring methods and technologies were analyzed and summarized. Monitoring downhole temperature and pressure in extra-deep gas wells seems impossible. It's so important to check deliverability due to unstable production adjustment. So far, the whole connectivity of gas reservoirs has not been figured out. And the reservoir type is also unclear because of water partly being produced from these reservoirs. Results show that(1) to adopt a calculation model via wellbore parameters and some monitoring technologies with low risk for underground shallow is conducive to not only conducting dynamic monitor in the later stage but also cutting down operation cost;(2) through a technology of wellhead variable flow rate, the production adjustment at wellhead may maintain stable, and actual deliverability is clear too;(3) via in-band and inter-band interference well testing and gas tracer monitoring, the connectivity can be definite; and (4) a model to monitor water invasion is established through Stiff chart. It is deemed, since Xixia gas reservoirs in SY structure are characterized by complex geological conditions, appropriate monitoring technologies may be adopted to develop them very scientifically and reasonably, promote development process, and submit proved reserves.
For the sake of submitting proved reserves of Xixia gas reservoirs in SY structure and drawing up a development scheme as early as possible, the whole connectivity, reservoir type, deliverability monitoring methods and technologies were analyzed and summarized. Monitoring downhole temperature and pressure in extra-deep gas wells seems impossible. It's so important to check deliverability due to unstable production adjustment. So far, the whole connectivity of gas reservoirs has not been figured out. And the reservoir type is also unclear because of water partly being produced from these reservoirs. Results show that(1) to adopt a calculation model via wellbore parameters and some monitoring technologies with low risk for underground shallow is conducive to not only conducting dynamic monitor in the later stage but also cutting down operation cost;(2) through a technology of wellhead variable flow rate, the production adjustment at wellhead may maintain stable, and actual deliverability is clear too;(3) via in-band and inter-band interference well testing and gas tracer monitoring, the connectivity can be definite; and (4) a model to monitor water invasion is established through Stiff chart. It is deemed, since Xixia gas reservoirs in SY structure are characterized by complex geological conditions, appropriate monitoring technologies may be adopted to develop them very scientifically and reasonably, promote development process, and submit proved reserves.
引文
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[3]李俊明,杨庆峰,陈胜军,等.川东北地区高压气井测试技术研究及现场应用[J].油气井测试,2014,23(2):35-44.
[4]许小强,陈琛,戚斌,等.川东北高温高压含硫超深气井测试技术实践[J].钻采工艺,2009,32(3):53-55.
[5]张中杰.关于气井试气采气及动态监测工艺规程的应用及探索[J].化工管理,2015(7):189.
[6]李跃林,张风波,曾桃,等.崖城13-1气田高温气井动态监测与分析技术[J].中国海上油气,2017,29(1):67-68.
[7]冯万奎,许清勇.川东龙门气田石炭系气藏试采动态监测及效果[J].天然气工业,2000,20(4):67-69.
[8]李汝勇,朱忠谦,伍藏原,等.克拉2气田压力动态监测方法[J].石油钻采工艺,2007,29(5):103-105.
[9]胥洪俊,徐文超,孙娟,等.永置式光学温度压力计在超深高压气井监测中的应用[J].油气井测试,2014,23(5):72-74.
[10]黄志洁,王林根,徐凤阳,等.动态监测技术在海上某1油气田的应用[J].测井技术,2008,32(3):282-285.
[11]杨波,范蓉,罗凌睿.川西含硫气井测试工艺技术及应用[J].天然气技术与经济,2018,12(4):42-44.
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