利用压差法进行低孔、低渗储层产能评价——以塔里木盆地大北气田白垩系巴什基奇克组为例

doi:10.11743/ogg20130220

石油与天然气地质 ›› 2013, Vol. 34 ›› Issue (2): 267-273.doi: 10.11743/ogg20130220

利用压差法进行低孔、低渗储层产能评价——以塔里木盆地大北气田白垩系巴什基奇克组为例

杨宁¹, 王贵文^1,2, 赖锦¹, 李鉴伦¹, 赵彬³, 蒋其君⁴, 王志⁵

1. 中国石油大学油气资源与探测国家重点实验室,北京 102249;
2. 中国石油大学地球科学学院,北京 102249;
3. 中国石油测井有限公司长庆事业部,陕西,西安 710061;
4. 潜能恒信能源技术股份有限公司,北京 100107;
5. 中国石油吉林油田地球物理勘探研究院,吉林长春 138000

收稿日期:2012-03-15 修回日期:2012-12-25 出版日期:2013-04-28 发布日期:2013-05-02
第一作者简介:杨宁(1982—),男,博士研究生,层序地层学及测井地质学。
基金项目:
国家"十二五"科技重大专项(2011ZX05020-008)。

Productivity evaluation of low porosity and low permeability reservoirs using differential pressure method:an example from the Cretaceous Bashijiqike Formation in Dabei area,the Tarim Basin

Yang Ning¹, Wang Guiwen^1,2, Lai Jin¹, Li Jianlun¹, Zhao Bin³, Jiang Qijun⁴, Wang Zhi⁵

1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;
2. College of Geosciences, China University of Petroleum, Beijing 102249, China;
3. CNPC Logging Co.Ltd, Xi'an, Shaanxi 710061, China;
4. Sino Geophysical CO.LTD, Beijing 100107, China;
5. Geophysical Reasearch Institute of Jilin Oilfield, PetroChina, Changchun, Jilin 138000, China

Received:2012-03-15 Revised:2012-12-25 Online:2013-04-28 Published:2013-05-02

摘要/Abstract

摘要：

塔里木盆地大北气田白垩系巴什基奇克组为典型的裂缝性致密砂岩储层,低孔、低渗基岩与裂缝形成的双孔隙结构造成储层内部气、水关系复杂。针对此类储层,利用传统的地质和测井方法进行产能评价一直以来都是难点。基于高等渗流力学理论,本次研究认为决定流体产能的参数是地层压差和孔隙毛管压力,只有当地层压差克服了储层中各相流体产生的毛管压力的阻碍,才能从孔隙介质中产出。在分析大量的岩心压汞资料的基础上,通过多元回归建立利用孔隙度、渗透率计算平均孔隙喉道半径的模型,基于孔隙介质中各相流体分布形态,转化得到各相毛管压力及等效压差,建立了利用"压差法"进行产能及流体性质判别的模型。选择大北气田3口井5个测试层段,对模型计算结果的准确性进行验证。在裂缝层段及非裂缝层段,评价结果与测试结果基本吻合,达到了设计的要求。

关键词: 孔喉半径, 等效压差, 压差法, 致密砂岩, 塔里木盆地

Abstract:

The Lower Cretaceous Bashijiqike Formation in Dabei area of Tarim Basin is a typical fractured tight sandstone reservoir with dual porosity structure consisting of low porosity and permeability matrix and fractures.This kind of dual porosity structure results in complex gas-water contact in the reservoir.It is always difficult to evaluate the productivity of this kind of reservoir by using the traditional geological and logging methods.Based on the theory of seepage mechanics,we believe that the formation pressure difference and capillary pressure are the parameters controlling productivity.The fluid can be produced from the porous media only when the formation differential pressure overtakes the resistance of capi-llary pressure generated by reservoir fluids of different phases.Based on analysis of a large amount of mercury injection data,we built a model through multiple regression analysis for calculating average pore throat radius with porosity and permeability.The capillary pressure of each phase and equivalent differential pressures can be estimated according to the distribution patterns of each phase in porous media.Finally,a model was built to predict productivity and fluid properties with the "Differential Pressure Method".Five tested layers in 3 wells were chosen to verify the accuracy of this model.The results show that the evaluation results are basically consistent with the test results.

Key words: pore-throat radius, equivalent differential pressure, differential pressure method, tight sandstone, Tarim Basin

中图分类号:

TE122.2

杨宁,王贵文,赖锦,等. 利用压差法进行低孔、低渗储层产能评价——以塔里木盆地大北气田白垩系巴什基奇克组为例[J]. 石油与天然气地质, 2013, 34(2): 267-273. doi: 10.11743/ogg20130220 Yang Ning,Wang Guiwen,Lai Jin,et al. Productivity evaluation of low porosity and low permeability reservoirs using differential pressure method:an example from the Cretaceous Bashijiqike Formation in Dabei area,the Tarim Basin[J]. Oil & Gas Geology, 2013, 34(2): 267-273. doi: 10.11743/ogg20130220

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利用压差法进行低孔、低渗储层产能评价——以塔里木盆地大北气田白垩系巴什基奇克组为例

Productivity evaluation of low porosity and low permeability reservoirs using differential pressure method:an example from the Cretaceous Bashijiqike Formation in Dabei area,the Tarim Basin

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