Three-dimensional physical modeling of waterflooding in metamorphic fractured reservoirs

Tong, Kaijun; Liu, Huiqing; Zhang, Yingchun; Wang, Jing; Ge, Lizhen; Dai, Wen Jin; Cai, Hong; Meng, Qingbang

doi:10.1016/s1876-3804(15)30054-9

Cited by 27 publications

(12 citation statements)

References 4 publications

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“…But if the pressure level is too high, the fractures are easy to water breakthrough to shorten the water-free oil production period and result in water sealing of matrix blocks. Therefore, it requires a suitable pressure to maintain oil production (Bai and Tang, 1997;Tong et al, 2015;Pietraszsek-Mattner et al, 2017). In this part, we first studied the stress sensitivity of both fracture and matrix by experiments and production data.…”

Section: Depletion Stagementioning

confidence: 99%

Construction of an efficient development mode for buried-hill fractured reservoirs in Bohai Bay

Ge¹,

Tong²,

Meng³

et al. 2020

Adv. Geo-Energy Res.

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Section: Depletion Stagementioning

confidence: 99%

Construction of an efficient development mode for buried-hill fractured reservoirs in Bohai Bay

Ge¹,

Tong²,

Meng³

et al. 2020

Adv. Geo-Energy Res.

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“…The metamorphic buried hill fractured reservoir in oilfield A is located in the mid-north section of Liaoxi low uplift. It is the largest metamorphic fractured reservoir invested in Bohai Oilfield at present [23] [24] [25] [26]. The main producing layer is Archean metamorphic buried hill, the buried depth of the reservoir is 1700 -1900 m, and the longitudinal span is as high as 200 m. The lithology is mainly biotite gneiss and plagioclase gneiss, and the reservoir type is pore-fracture.…”

Section: General Situation Of Oilfieldmentioning

confidence: 99%

Research and Application of Water Flooding Timing and Method for Blocky Bottom Water Fractured Buried Hill Reservoir

Zhu¹,

Cai²,

Wang³

et al. 2019

JPEE

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Oilfield A is a fractured buried hill reservoir in Bohai bay of China. In order to solve the difficult problem of water flooding timing and method in oilfield. Considering the characteristics of the buried hill fractures with stress sensitivity and strong heterogeneity, the ECLIPSE software was used in the research, and a three-dimensional injection-production numerical model for horizontal wells in buried hill reservoirs is established. According to the main research factors in water flooding, a series of water flooding schemes are designed, and the optimization of water flooding timing, oil recovery rate and water flooding mode in buried hill reservoirs were carried out. The results show that the optimum pressure level of fractured reservoir is about 70% of the original reservoir pressure. The optimal water flooding method is the conventional water flooding in the initial stage, when the water cut reaches 80%, it is converted into periodic water flooding. The oil recovery is the highest when the water injection period is 4 months. Field tests show that conventional water flooding is carried out in the initial stage of the oilfield A when the pressure is reduced to 70% of the original. Periodic water flooding is carried out when water cut is 80%. Good development results had been achieved in the 10 years since oilfield A was put into production. The average productivity of single well reached 300 m 3 /d in the initial stage, at present, the water cut is 60%, and the recovery degree is 18.5%, which is better than that of similar oilfields. This technology improves the water flooding effect of blocky bottom water fractured dual media reservoirs in metamorphic buried hills, and provides a reference for the development of similar reservoirs.

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“…Oilfield Z is located in the middle-north section of the western Liaoning low swell in Bohai Bay area. It is the largest metamorphic fractured reservoir in offshore oilfields in China [21][22] . The main formation is Archaean metamorphic buried hill, and the reservoir type is massive reservoir with weak bottom water and dual media.…”

Section: General Introduction Of Oilfieldmentioning

confidence: 99%

Optimization Research of Injection-Production Mode in Fractured Buried Hill Reservoir

Lee¹,

Wang²,

Chao³

et al. 2019

IJEAS

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Oilfield Z in Bohai bay is a fractured buried hill reservoir. Different from conventional sandstone reservoirs, the reservoir space is mainly divided into matrix and fracture system, which are quite different in reservoir physical properties and porous flow mechanism. It is easy to cause intra-layer interference of reservoir in the process of water flooding development. In order to improve the water flooding development effect in oilfield Z, and solve the problem of intra-layer interference of fracture and matrix system. Taking the actual characteristic parameters of oilfield Z as reference, the development effect of oilfield under different injection-production modes is predicted by numerical simulation software. The results show that under the mode of weak injection and forcible production, the swept volume of water flooding in the model is the largest and the remaining oil distribution is the least. In order to verify the reliability of the numerical simulation results, three-dimensional physical simulation experiments was carried out, which simulate the development effect under different injection-production mode. The results show that the water-free recovery period is longer, the water cut rises slowly and the oil recovery is higher under the mode of weak injection and forcible production. The results of physical experiments are consistent with those of numerical simulation. The research results are applied to actual oilfield production. The injection-production mode in the original scheme has been adjusted. Compared with the original scheme design, the effect of oilfield development is improved, and the increment of daily oil production for average single well reaches 83 m3. It can provide a reference for the study of injection-production mode in fractured buried hill reservoirs of the same kind.

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Three-dimensional physical modeling of waterflooding in metamorphic fractured reservoirs

Cited by 27 publications

References 4 publications

Construction of an efficient development mode for buried-hill fractured reservoirs in Bohai Bay

Construction of an efficient development mode for buried-hill fractured reservoirs in Bohai Bay

Research and Application of Water Flooding Timing and Method for Blocky Bottom Water Fractured Buried Hill Reservoir

Optimization Research of Injection-Production Mode in Fractured Buried Hill Reservoir

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