断溶体油藏油源深度对井温分布影响的数值模拟

doi:10.11720/wtyht.2020.1116

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Abstract

The carbonate karstic-fault oil-bearing reservoir is rich in oil resources storage,and large karst caves and fractures are the main reservoir space and flow channels.There are mud leakage and hole collapse in the drilling process,so it is difficult to carry out conventional logging measurement,and reservoir evaluation or even reservoir depth (i.e. oil source location) can not be determined.Temperature curve is often used in production logging,and it is not affected by borehole condition and it can reflect the depth of the reservoir.Based on the morphological characteristics and size of karstic-fault reservoir,the authors constructed the geometric models of wellbore,formation,fracture and cave,and simulated the variation of wellbore temperature in the production of karstic-fault reservoir by numerical simulation method.The simulation results were analyzed,and then the oil source depth of karstic-fault reservoir was estimated by well temperature curve,which provides technical support for further development of karstic-fault reservoir.

Key words： karstic-fault reservoir numerical simulation well temperature curve reservoir depth

Received: 12 March 2019 Published: 28 August 2020

P631.4

Corresponding Authors: Jian LEI E-mail: huwg.xbsj@sinopec.com;leijian18@mails.jlu.edu.cn

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	Articles by authors
	Wen-Ge HU
	Ning ZOU
	Dan-Dan LI
	Zhi-Juan WANG
	Jian LEI
	Yu-Hang GUO
	Bao-Zhi PAN

Cite this article:

Wen-Ge HU,Ning ZOU,Dan-Dan LI, et al. The numerical simulation for the influence of reservoir depth on well temperature in karstic-fault reservoir[J]. Geophysical and Geochemical Exploration, 2020, 44(4): 748-755.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1116 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I4/748

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Seismic image along the fault(The blue dotted line area in the figure is karst cave^[17])

Schematic diagram of physical model

Simulation parameters

Initial state of formation

Grid generation of model 4
a—global;b—karst cave and wellbore

The temperature distribution and well temperature curve of the wellbore(model 1)
a—section diagram of temperature distribution;b—three dimensional distribution of temperature;c—well temperature curve

The temperature distribution and well temperature curve when the cave is below the well-bottom (model 2)
a—section diagram of temperature distribution;b—three dimensional distribution of temperature;c—well temperature curve

The temperature distribution and well temperature curve when the cave is below the well-bottom (model 3)
a—section diagram of temperature distribution;b—three dimensional distribution of temperature;c—well temperature curve

The temperature distribution and well temperature curve when the cave is at the above of the well-bottom (model 4)
a—section diagram of temperature distribution;b—three dimensional distribution of temperature;c—well temperature curve

Comparison of measured and simulated well temperature curves

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