Derivation of water flooding characteristic curve for high water-cut oilfields

Song, Zhaojie; Li, Zhiping; Lai, Fengpeng; Liu, Gang; Gan, Huohua

doi:10.1016/s1876-3804(13)60025-7

Cited by 47 publications

(34 citation statements)

References 5 publications

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“…In addition, the breakthrough time is longer in horizontal wells than the vertical wells. These advantages make horizontal wells more attractive than the conventional vertical wells for controlling the water coning during oil production (Yue et al, 2012;Li et al, 2013;Yue et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

“…In the oil wells, on the other hand, this increases the cost of water-oil separation and maintenance in surface equipment. In more serious situations it may cause stoppage of production and so huge amounts of oil to remain unproduced in the reservoir (Zaitoun and Kohler, 1999, Faber, 1999, Hongyin and Peimao, 2000Ji et al, 2012;Song et al, 2013;Chuanzhi et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Simulation study of controlling water coning in oil reservoirs through drilling of horizontal wells

Dabiri¹,

Karaei²,

Azdarpour³

2017

Biosci. Biotech. Res. Comm

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Oil production is affected by the reservoir pressure, where the higher the reservoir pressure, the higher the production rate. In most cases, water is also produced with oil, which can cause several negative issues. In oil wells, after a short period of oil production, early water production will cause serious decrease in oil production. Actually water coning is an event in which water and oil surfaces will move simultaneously to the well perforation. This event, if occurs in a well, will affect the well production and will increase the costs. Consequently, the production life of the well will be shortened. This paper presents the results of simulation study of an under saturated oil reservoir with no primary gas cap present in the reservoir with oil API gravity of 35. The feasibility of water coning remedy through drilling new horizontal and vertical wells was investigated using ECLIPSE software. The simulation results showed that water production rate is increased with increasing the oil production rate from the reservoir. In addition, water coning was signifi cantly reduced with drilling new horizontal and vertical wells. However, horizontal wells found to be more effective than the vertical wells. The oil production rate increased with horizontal wells while water production rate decreased signifi cantly.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation study of controlling water coning in oil reservoirs through drilling of horizontal wells

Dabiri¹,

Karaei²,

Azdarpour³

2017

Biosci. Biotech. Res. Comm

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show abstract

“…Ji et al (2011) analyzed the factors affecting the capillary number during ultra-high water cut period and indicated the research direction of displacement efficiency. Liu et al (2011), Wang et al(2013 and Song et al (2013) investigated the flow characteristic in porous media in the ultra-high water stage and built different relative permeability formulas and waterflood curves. In this paper a new model based on the new relationship of water and oil relative permeability is raised which is physically meaningful and owns a quick efficient and reliable quality to deal with the on-site data.…”

Section: Discussionmentioning

confidence: 99%

Development prediction and the theoretical analysis in the ultra-high water cut stage for water-flooding sandstone reservoirs

Cui

Ding

et al. 2016

J Petrol Explor Prod Technol

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A new relationship between the ratio of water and oil relative permeability, and the water saturation is proposed based on the flow characteristic in porous media in the ultra-high water cut stage which results in a new water flooding characteristic curve with reservoir engineering method. Then a new algorithm to forecast development indexes is derived on the basis of the new relationship above, the new water flooding characteristic curve and the production decline law using Welge equation in which there are many parameters including time, water cut, the average water saturation and the oil recovery that can be used to evaluate the recoverable reserve. Through the examinations with the numerical simulation method and the on-site application, it shows that the new algorithm can give an accurate prediction with an relative error less than 6 %, which is instructive for the oil field development.

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“…4, and the new formula of K ro /K rw and S w was obtained through regression, which is shown in Table 2. The above figure and table showed the high precision of formula (3) fitting the relation between ln(K ro /K rw ) and S w at ultra-high water cut stage and confirmed that formula 3 could characterize the relation between K ro /K rw and S w not only at ultra-high water cut stage but also at the high water cut stage, with more fitted data points and higher correlation coefficient than the method in reference where the formula is ln(K ro /K rw ) = -548.1S w 2 ?639.25S w -187.56 with correlation coefficient of 0.9950 (Song et al 2013). Thus, formula (3) is applicable in theoretical derivation of new water drive curve and its field application.…”

Section: Introductionmentioning

confidence: 99%

“…(Table 1), and the curve of K ro /K rw and S w was plotted ( Fig. 3) in the semi-log coordinate by reference to data of oil-water relative permeability of Zhuang_19 Well Block in the Xifeng Oilfield (Song et al 2013). It is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

A new water drive curve at ultra-high water cut stage and application in prediction of oilfield development

Hua

Liu

Sun³

2016

J Petrol Explor Prod Technol

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For the water-flooded reservoir at ultra-high water cut stage, the ratio of oil and water relative permeability and the water saturation deviate from the linear relationship and show the downwarping trend in the semilog coordinate, and the conventional water drive curves show the upwarping trend. Aiming at predicting the dynamic, recoverable reserve and recovery of oilfields at ultra-high water cut stage, a new formula characterizing the relation between the ratio of oil and water relative permeability and the water saturation was proposed, derivation of a new water drive curve was done by reservoir engineering methods, and the formula of recoverable reserve and recovery was derived. Comparison of the new water drive curve and the conventional one through numerical simulation and field application showed higher accuracy and better adaptability resulted from the new water drive curve, which solved the problems of upwarping and big prediction error in curves of ultra-high water cut stage. Keywords Ultra-high water cut stage Á Water drive curve Á Relative permeability curves Á Recovery Á Water cut

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Derivation of water flooding characteristic curve for high water-cut oilfields

Cited by 47 publications

References 5 publications

Simulation study of controlling water coning in oil reservoirs through drilling of horizontal wells

Simulation study of controlling water coning in oil reservoirs through drilling of horizontal wells

Development prediction and the theoretical analysis in the ultra-high water cut stage for water-flooding sandstone reservoirs

A new water drive curve at ultra-high water cut stage and application in prediction of oilfield development

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