天然气地球科学

• 天然气地质学 • 上一篇    下一篇

吐哈盆地天然气地质条件、资源潜力及勘探方向

张品,苟红光,龙飞,佘家朝,王志勇,金颖   

  1. 吐哈油田勘探开发研究院,新疆 哈密 839009
  • 收稿日期:2018-07-27 修回日期:2018-09-12 出版日期:2018-10-10
  • 通讯作者: 苟红光(1972-),男,陕西蓝田人,高级工程师,主要从事石油及天然气地质研究. E-mail:gouhongguang@petrochina.com.cn.
  • 作者简介:张品(1985-),女,河南淅川人,工程师,主要从事油气地球化学研究.E-mail:yjyzhp@petrochina.com.cn.
  • 基金资助:
    中国石油天然气股份公司“新疆油田和吐哈油田勘探开发关键技术研究与应用”重大科技专项“吐哈探区油气接替领域勘探关键技术研究与应用”(编号:2017E-0404);
    中国石油天然气集团公司重大科技专项“中国石油第四次油气资源评价”(编号:2013E-050206)联合资助.


Natural gas geological conditions,resource potential and exploration direction in Turpan-Hami Basin

Zhang Pin,Gou Hong-guang,Long Fei,She Jia-chao,Wang Zhi-yong,Jin Ying   

  1. Research Institute of Exploration and Development,Tuha Oilfield Company,Hami 839009,China
  • Received:2018-07-27 Revised:2018-09-12 Online:2018-10-10

摘要: 近年来,吐哈盆地常规和非常规天然气勘探不断获得新突破,地质认识和资源潜力等不断更新,急需对其资源潜力开展综合评价,进一步摸清天然气资源潜力及规模,为加快吐哈盆地天然气勘探开发提供依据。吐哈盆地天然气主要分布于J1b—J2x1+2、J2x3+4、J2s—J2q、J3k,K1s、Esh 6个层系。通过大量实验分析数据,采用数理统计的方法对生烃条件、储层物性、储盖组合配置及成藏模式等成藏地质条件进行系统研究,认为其烃源岩主要为侏罗系西山窑组、八道湾组煤系烃源岩,其生烃强度较大的地区位于台北凹陷主体沉降区,具备形成大气田的物质基础。储集层主要为辫状河三角洲分流河道的粗砂岩,总体上以低孔低渗为主,这些砂体横向变化大,连通性差。常规天然气成藏主要受构造和岩性控制,根据控制因素差异划分为4种成藏模式,分别为正向分异、逆向分异、垂向分异及混合型油气成藏模式。非常规致密砂岩气成藏主要受沉积及成岩作用控制,在大面积低孔低渗储层广泛分布的背景下,局部发育渗透性较好的甜点。采用类比法、统计法及特尔菲加权法综合得到常规天然气地质资源量为2 434.57×108m3,剩余资源量为1 412.56×108m3,水西沟群致密气采用丰度类比法、小面元容积法、快速评价法计算出地质资源量为5 087.66×108m3,可采资源量为1 940.6×108m3。通过剩余资源量、剩余资源丰度分布指出了5个天然气有利勘探方向。

关键词: 吐哈盆地, 天然气, 地质条件, 资源潜力, 勘探方向

Abstract: In recent years,a series of progress and breakthroughs havebeen made in the conventional and unconventional natural gas exploration in the Turpan-Hami Basin,and the geological conditions and resource potentials havebeen updated constantly.At present,it is in urgent need to assess the natural gas resources in the Turpan-Hami Basin comprehensively,so as to figure out the natural gas resources and provide a basis for promoting the exploration and development of natural gas in this basin.The natural gas is mainly distributed in J1b—J2x1+2、J2x3+4、J2s—J2q、J3k,K1s and Es strata in Turpan Hami Basin.We have comprehensively studied the reservoir geological conditions as hydrocarbon generation,petrophysical property,reservoir-caprock assemblage,reservoir formation and reservoir accumulation model.Using the mathematical statistics,it was considered that the source rocks are mainly from Jurassic Xishanyao and Badaowan formations,the area where the large amount of hydrocarbon generation intensity is located in the main subsidence area of Taipei Sag,thus possessing the material conditions of forming large-scalegas fields.The grit sandstone of braided river delta distributary channel is the main stratum,the sand bodies vary quicklyalong the lateral and have poor connectivity,low porosity and permeability.Conventional gas accumulation model is mainly controlled by structure and lithology,four types of accumulation models are classified according to controlling factors,i.e.,forward differentiation,reverse differentiation,vertical differentiation and mixed oil and accumulation model.Unconventional tight Sawa Kesunghide is mainly controlled by sedimentation and diagenesis.They have good osmosis desserts in some localareas in lowporosity and low permeability reservoirs of large area.Using analogy method,statisticalmethod and the Delphi method,we have calculated out the conventional gas resources and the residual resources,about 2 434.57×108m and 1 412.56×108m3,respectively.Then,using resource abundance analogy method,volumetric method and rapid evaluation method,we alsocalculated out thetight sandstone gas resources in Shuixigou group of the Turpan Hami-Basin.Its resources and recoverable resources are about 5 087.66×108m and 1 940.6×108m3,respectively.The favorable exploration direction and targets of natural gas were pointed out by contrasting the residual resource,the abundance of residual resources.

Key words: Turpan-Hami Basin, Natural gas, Accumulation condition, Resource potential, Potential exploration area

中图分类号: 

  • TE132.1
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