Description of steam chamber shape in heavy oil recovery using 4D microgravity measurement technology

Li, Yujun; Ren, Fangxiang; Zhou, Dasheng; Tian, Xiaoyong

doi:10.1016/s1876-3804(13)60052-x

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…According to statistics, by the end of 2018, China has about 15 billion tons of heavy oil reserves, one of China's important fields of oil and gas exploration and development. The global heavy oil recovery degree is about 10-15%, and the domestic heavy oil recovery degree is about 5-7% because of the high development cost and difficult recovery technology [1,2,3] .…”

Section: Introductionmentioning

confidence: 99%

Application of SAGD technology in the development of super heavy oil reservoir buried medium deep

2023

J. Phys.: Conf. Ser.

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Continental super heavy oil reservoirs in China are characterized by deep burial depth, strong reservoir heterogeneity and high oil viscosity. The steam huff and puff technology are used to develop this type of reservoir, but in this development method, its oil recovery rate, oil steam ratio, and ultimate recovery are low. The benefit of the reservoir development is losses in this high cost per ton of oil. Many vertical wells injecting steam and one horizontal well-producing liquids pattern of SAGD technology (abbreviated as VERTIHORIONATAL pattern SAGD) were Innovated to solve the problems based on SAGD technology introduced from Canada. The SAGD technology introduced in Canada was made of double horizontal wells. The above horizontal well injects steam and the other horizontal well produces liquids continued (abbreviated as DOUBLE HORIZONTAL pattern SAGD). The VERTIHORIONATAL SAGD technology makes full use of the original well pattern of huff and puff and takes advantage of the thermal connectivity and underground temperature field formed by early development; At the same time, the VERTIHORIONATAL pattern SAGD technology can effectively solve the problem of steam cavity uneven expansion caused by reservoir heterogeneity by adjusting the location of steam injection vertical wells. It can also balance the liquid production in good horizontal sections and improve steam cavity formation speed by adjusting steam injection well sections and steam injection parameters. The technology has been successfully applied in the medium-deep super heavy oil reservoir in the Shu-1 area, Du84 block, Liaohe Oilfield. Seven oil wells with a daily output of 100 tons have been cultivated, and a stable production of million tons for four consecutive years. It has been built as China’s largest SAGD development demonstration area for medium-deep super-heavy oil.

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Section: Introductionmentioning

confidence: 99%

Application of SAGD technology in the development of super heavy oil reservoir buried medium deep

2023

J. Phys.: Conf. Ser.

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“…Subsea gravimeters have been used to monitor the height of water-gas contact in water injection gas reservoirs in offshore Norway with an accuracy of meter level [9]. In the Liaohe oilfield, time-shift microgravity monitoring has been used to quantitatively describe changing steam chamber shape during steam-assisted gravity drainage (SAGD) production, providing a reliable basis for adjusting the steam injection scheme [10]. Previous research results have shown that microgravity exploration is suitable for anomalies caused by density changes from displacement and migration of underground fluids in oil and gas reservoirs, with the key solution being to accurately separate the residual gravity anomalies representing reservoir density.…”

Section: Introductionmentioning

confidence: 99%

Research on Remaining Oil Characterization in Superheavy Oil Reservoir by Microgravity Exploration

Zheng

Liang

et al. 2022

Geofluids

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Some physical processes such as oil and gas development, metal deposit collection, and groundwater resource migration can cause density changes, for which microgravity monitoring is the most intuitive method to monitor the density change process. Based on the basic principle of microgravity measurement and the idea of multiscale separation, a multiscale, second-order, surface-fitting, residual gravity anomaly extraction method is proposed to separate superimposed microgravity fields. In this method, regional fields of different scales are fitted and calculated successively with the measurement points as the center, so as to separate the gravity anomalies produced by different-depth density bodies. Results from actual data show that this method extracts the reservoir’s residual density characteristics of plane gravity anomaly on the basis of remaining oil distribution characteristics, consistent with reservoir numerical simulation results. A three-dimensional least-squares inversion of the method for extracting residual gravity anomaly was carried out, with the inversion results consistent with the results of vertical remaining oil distribution characteristics and well-test production results.

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A New Method for Depicting the Three-Dimensional Shape of the Steam Chamber

Wang

et al. 2021

Springer Series in Geomechanics and Geoengineering

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Description of steam chamber shape in heavy oil recovery using 4D microgravity measurement technology

Cited by 9 publications

References 4 publications

Application of SAGD technology in the development of super heavy oil reservoir buried medium deep

Application of SAGD technology in the development of super heavy oil reservoir buried medium deep

Research on Remaining Oil Characterization in Superheavy Oil Reservoir by Microgravity Exploration

A New Method for Depicting the Three-Dimensional Shape of the Steam Chamber

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