Prediction of thin sandstone reservoirs of Wutonggou Formation in the DX178 well area of Xinjiang by using liquid mobility factor method

Guo Xiao-long, Li Xuan, Li Bo, Yang Ya-di, Jiang Shu-li, Xu Jing

doi:10.11764/j.issn.1672-1926.2018.07.001

2018 , Vol. 29 >Issue 8: 1172 - 1180

DOI: https://doi.org/10.11764/j.issn.1672-1926.2018.07.001

Prediction of thin sandstone reservoirs of Wutonggou Formation in the DX178 well area of Xinjiang by using liquid mobility factor method

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1.PetroChina Research Institute of Petroleum Exploration & Development，Langfang 065007，China;
2.Gas Recovery Plant No.1，PetroChina Xinjiang Oilfield Company，Karamay 834000，China;
3.Oil Recovery Plant No.4，PetroChinaHuabei Oilfield Company，Langfang 065007，China

Received date: 2018-05-25

Revised date: 2018-07-18

Online published: 2019-08-28

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Abstract

The Wutonggou Formation in the DX178 well area develops two sets of upper and lower gas layers with natural gas geological reserves of 31.49×108m，which is a favorable area for the next step to development and production.However，the reservoir in the Wutonggou Formation is thin，and the frequency of existing seismic data is relatively low.The investment cost for exploration and development is high and the risk is large.Therefore，it is necessary to improve the sand drilling rate of horizontal well and study on the identification method of thin sand.The sandstone reservoirs with large thickness can be merely identified by conventional post-stack seismic inversion method.Owing to the limitation of seismic resolution for the thin sand，the prediction results cannot meet the needs of exploration and development.In this paper，the liquid mobility factor calculated by the high-precision seismic time-frequency analysis method can effectively characterize the sandstone reservoir and non-reservoir layers.According to the logging data，the fluid activity factor of the sandstone reservoir was calibrated by the liquid mobility factor，and the distribution area of sandstone can also be predicted.This method was used to predict the thin sandstone reservoirs of the Wutonggou Formation in DX178 wells area.The prediction results are in good agreement with the actual drilling results.During the implementation process of the four horizontal well drilling，the well trajectory was timely adjusted according to the prediction results，which effectively improved the sand drilling rate of horizontal well，and achieved good development results.

Key words： Multi-attribute fusion; Liquid mobility factor; WutonggouFormation; Thin sandstone

Cite this article

Guo Xiao-long, Li Xuan, Li Bo, Yang Ya-di, Jiang Shu-li, Xu Jing . Prediction of thin sandstone reservoirs of Wutonggou Formation in the DX178 well area of Xinjiang by using liquid mobility factor method[J]. Natural Gas Geoscience, 2018 , 29(8) : 1172 -1180 . DOI: 10.11764/j.issn.1672-1926.2018.07.001

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