A New Technique: Fishbone Well Injection

Ding, Zupeng; Liu, Y. T.; Gong, Yuning; Xu, Ning

doi:10.1080/10916466.2010.518196

Cited by 6 publications

(6 citation statements)

References 2 publications

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“…In addition, different numerical models have been developed to simulate well productivity by treating each branch as a fracture with dimensions similar to the lateral dimensions. Several reservoir models have been evaluated to simulate dual porosity systems, triple porosity systems, and isotropic and anisotropic permeability conditions [13]. Moreover, computational fluid dynamics (CFD) analysis has been utilized to model the performance of fishbone wells in depleted reservoirs under water flooding operations.…”

Section: Inflow Performance Relationshipmentioning

confidence: 99%

Application of Artificial Intelligence Techniques to Predict the Well Productivity of Fishbone Wells

2019

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Fishbone multilateral wells are applied to enhance well productivity by increasing the contact area between the bottomhole and reservoir region. Fishbone wells are characterized by reduced operational time and a competitive cost in comparison to hydraulic fracturing operations. However, limited models are reported to determine the productivity of fishbone wells. In this paper, several artificial intelligence methods were applied to estimate the performance of fishbone wells producing from a heterogeneous and anisotropic gas reservoir. The well productivity was determined using an artificial neural network, a fuzzy logic system and a radial basis network. The models were developed and validated utilizing 250 data sets, with the inputs being the permeability ratio (Kh/Kv), flowing bottomhole pressure and lateral length. The results showed that the artificial intelligence models were able to predict the fishbone well productivity with an acceptable absolute error of 7.23%. Moreover, a mathematical equation was extracted from the artificial neural network, which is able to provide a simple and direct estimation of fishbone well productivity. Actual flow tests were used to evaluate the reliability of the developed model, and a very acceptable match was obtained between the predicted and actual flow rates, wherein an absolute error of 6.92% was achieved. This paper presents effective models for determining the well performance of complex multilateral wells producing from heterogeneous reservoirs. The developed models will help to reduce the uncertainty associated with numerical methods, and the extracted equation can be inserted into commercial software, thereby significantly reducing deviation between the actual data and simulated results.

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Section: Inflow Performance Relationshipmentioning

confidence: 99%

Application of Artificial Intelligence Techniques to Predict the Well Productivity of Fishbone Wells

2019

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“… 2 Compared with the horizontal injection well, the fishbone well can increase the control area, form planar flooding, and hold the injection water upward slowly and evenly. 8 Multilateral wells have better performance than vertical wells in shale due to the larger heat-exchange area during the process of in situ conversion. 9 Zhou found that the individual layer deliverability of a multilateral well with limited sand production was three times the multilayer production of the common deviated well.…”

Section: Introductionmentioning

confidence: 99%

“… 24 On this basis, many studies have proposed that the branch angle is an important factor causing interference between branches. 8 , 25 For multilateral wells, the interaction among laterals can also influence productivity. 26 The parameters related to the shape of MLHWs, such as branch length and branch angles, can obviously affect the transient pressure dynamics of MLHWs.…”

Section: Introductionmentioning

confidence: 99%

“…Some experimental and numerical simulation studies have been conducted to analyze the application of fishbone well in CO 2 huff n puff and the process of SAGD, and the recovery differences of vertical wells, horizontal wells, and multi-branch wells are compared and studied . Compared with the horizontal injection well, the fishbone well can increase the control area, form planar flooding, and hold the injection water upward slowly and evenly . Multilateral wells have better performance than vertical wells in shale due to the larger heat-exchange area during the process of in situ conversion .…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Distribution Characteristics of Oil and Water during Water Flooding in a Fishbone Well with Different Branch Angles

et al. 2022

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Lab experiments, field pilots, and numerical modeling focusing on fluid flow aspects have indicated that multi-branch wells are technically effective and promising. Several researchers have conducted some experiments for a fishbone well strategy with mixed results. Our objective in this work is to study the impact of the different fishbone well patterns, such as branch angle, on the distribution of remaining oil after water flooding. In this paper, the interference effect between branches on oil recovery is studied in three steps. First, the interferences between fishbone wells with different branch angles were measured by hydro-electric simulation experiments. Second, two-dimensional visualization water flooding experiments were carried out to clarify the remaining oil distribution at different branch angles. Third, the distribution of oil and water in fishbone wells was verified by establishing a numerical model. The modeling results agree well with the experimental phenomena. At the same time, the variation trend of water and oil production in each branch is analyzed by numerical simulation results. The results indicate that the production is strongly dependent on the branch angles, and the highest recovery was 60.2% at a 45° branch angle.

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“…A buried hill reservoir features developed fractures, good connection, and thick layer [29], resulting in low productivity and poor development effect when developed with vertical wells. Given the problems existing in developing reservoirs with vertical wells, considerable research has been conducted on the mechanisms of complex structure wells, parameters for optimizing stereo injection-production, productivity, and influencing factors of the development of horizontal wells [30][31][32][33][34][35]. The well pattern of vertical and horizontal wells was proposed, which contributed to the improvement of buried hill reservoir development.…”

Section: (H) Buried Hill Reservoirmentioning

confidence: 99%

Experimental and Simulation Study of Complex Structure Well Pattern Optimization for Buried Hill Fractured Reservoirs

Liu

Ji-chang

et al. 2014

Arab J Sci Eng

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The use of a vertical well pattern results in productivity deficiency and poor development effect when developing buried hill reservoirs with complex properties. In this work, experiments are conducted to determine the best pattern for complex structure wells in buried hill reservoirs. Discretization is employed in an experimental method that uses unit cubic rocks with a size of 5 cm × 5 cm × 5 cm. The rocks are bonded in a spotty or reticular design to form a macroscopic model. Based on water flooding similarity criteria of fractured reservoir, an experimental model similar to a quarter of a five-spot unit in an actual reservoir is designed and manufactured. By selectively plugging wells in the model, various well patterns are established. Simulation results indicate that the vertical-vertical well pattern exhibits the fastest water breakthrough, fastest increase in water cut, and lowest recovery under the same pressure difference and well spacing. The horizontal-horizontal well pattern has the slowest water cut increase and the highest final oil recovery. For fishbone wells, this pattern facilitates an ideal development effect when the percolation direction is perpendicular to the plane determined by the mother bore and branch. When liquid rate, water cut, and recovery are considered, the horizontal-horizontal well pattern is recommended when conditions allow.

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A New Technique: Fishbone Well Injection

Cited by 6 publications

References 2 publications

Application of Artificial Intelligence Techniques to Predict the Well Productivity of Fishbone Wells

Application of Artificial Intelligence Techniques to Predict the Well Productivity of Fishbone Wells

Dynamic Distribution Characteristics of Oil and Water during Water Flooding in a Fishbone Well with Different Branch Angles

Experimental and Simulation Study of Complex Structure Well Pattern Optimization for Buried Hill Fractured Reservoirs

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