Laboratory Development and Field Application of a Novel Water-Based Drill-In Fluid for Geopressured Horizontal Wells

1996 ◽  
Author(s):  
J.W. Dobson ◽  
J.C. Harrison ◽  
A.H. Hale ◽  
H.C. Lau ◽  
L.A. Bernardi ◽  
...  
Keyword(s):  
Horizontal Wells ◽  
Field Application ◽  
Water Based ◽  
Laboratory Development

Laboratory Development and Field Application of a Novel Water-Based Drill-In Fluid for Geopressured Horizontal Wells

2000 ◽  
Vol 15 (02) ◽  
pp. 105-111 ◽  
Author(s):  
J.W. Dobson ◽  
J.C. Harrison ◽  
A.H. Hale ◽  
H.C. Lau ◽  
L.A. Bernardi ◽  
...  
Keyword(s):  
Horizontal Wells ◽  
Field Application ◽  
Water Based ◽  
Laboratory Development

Production Performance Analysis for Multi-Branched Horizontal Wells in Composite Coal Bed Methane Reservoir Considering Stress Sensitivity

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Ruizhong Jiang ◽  
Xiuwei Liu ◽  
Yongzheng Cui ◽  
Xing Wang ◽  
Yue Gao ◽  
...  
Keyword(s):  
Superposition Principle ◽  
Horizontal Wells ◽  
Stress Sensitivity ◽  
Field Application ◽  
Model Verification ◽  
Production Performance ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Element Discretization ◽  
Type Curves

Abstract Coal bed methane (CBM) significantly contributes to unconventional energy resources. With the development of the drilling technology, multi-branched horizontal wells (MBHWs) have been put into the exploitation of CBM. In this paper, a semi-analytical mathematical model is introduced to study the production characteristics of MBHWs in the composite CBM reservoir. Stress sensitivity, composite reservoir, and complex seepage mechanisms (desorption, diffusion, and Darcy flow) are taken into consideration. Through Pedrosa transformation, Perturbation transformation, Laplace transformation, Finite cosine transformation, element discretization, superposition principle, and Stehfest numerical inversion, pseudo-pressure dynamic curves and production decline curves are plotted and 13 flow regimes are divided. Then, the sensitivity analysis of related parameters is conducted to study the influences of these parameters based on these two type curves. Model verification and field application are introduced which shows that the model is reliable. The model proposed in this paper and relevant results analysis can provide some significant guidance for a better understanding of the production behavior of MBHWs in the composite CBM reservoir.

Modeling of Both Near-Wellbore Damage and Natural Cleanup of Horizontal Wells Drilled With Water-Based Drilling Fluids

SPE Journal ◽  
2004 ◽  
Vol 9 (03) ◽  
pp. 252-264 ◽  
Author(s):  
Y. Ding ◽  
D. Longeron ◽  
G. Renard ◽  
A. Audibert
Keyword(s):  
Horizontal Wells ◽  
Drilling Fluids ◽  
Water Based

scholarly journals Performance Evaluation of Multistage Fractured Horizontal Wells in Tight Gas Reservoirs at Block M, Ordos Basin

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 613
Author(s):  
Li Wu ◽  
Jiqun Zhang ◽  
Deli Jia ◽  
Shuoliang Wang ◽  
Yiqun Yan
Keyword(s):  
Ordos Basin ◽  
Horizontal Wells ◽  
Entropy Method ◽  
Field Application ◽  
Tight Sandstone ◽  
Factors Affecting ◽  
Well Production ◽  
Advantages And Disadvantages ◽  
Single Well ◽  
Fractured Horizontal Wells

Block M of the Ordos Basin is a typical low-permeability tight sandstone gas accumulation. To develop these reservoirs, various horizontal well fracturing technologies, such as hydra-jet fracturing, open-hole packer multistage fracturing, and perf-and-plug multistage fracturing, have been implemented in practice, showing greatly varying performance. In this paper, six fracturing technologies adopted in Block M are reviewed in terms of principle, applicability, advantages, and disadvantages, and their field application effects are compared from the technical and economic perspectives. Furthermore, the main factors affecting the productivity of fractured horizontal wells are determined using the entropy method, the causes for the difference in application effects of the fracturing technologies are analyzed, and a comprehensive productivity impact index (CPII) in good correlation with the single-well production of fractured horizontal wells is constructed. This article provides a simple and applicable method for predicting the performance of multi-frac horizontal wells that takes multiple factors into account. The results can be used to select completion methods and optimize fracturing parameters in similar reservoirs.

An Innovative Acid Diversion Using In-Situ Foam Generation: Experimental and Successful Field Application

2021 ◽  
Author(s):  
Ayman Al-Nakhli ◽  
Mohannad Gizani ◽  
Abdualilah Baiz ◽  
Mohammed Yami
Keyword(s):  
Horizontal Wells ◽  
Field Application ◽  
Damage Potential ◽  
Left Behind ◽  
Foam Generation ◽  
Water Breakthrough ◽  
Acid Diversion ◽  
Well Injectivity ◽  
Pressure Resistance

Abstract In carbonate reservoirs, effective acid stimulation is essential to overcome reservoir damage and mainline high oil production. Recently, most of oil wells are being drilled horizontally to maximize production. Acid stimulation of horizontal wells with long intervals require very effective acid diversion system. If the diversion system is not efficient enough, most of the acid will be leaking-off near the casing shoe, in openhole well, which will result in a fast water breakthrough and diminish production. This study describes a breakthrough treatment for acidizing long horizontal wells in carbonate formations. The novel technology is based on in-situ foam generation to divert the acid. Gas diversion, as a foam, is a perfect diversion mechanism as gas creates pressure resistance which forces the acid stages to be diverted to new ones?. The diversion will not require the acid to be spent, compared to viscoelastic diverting system. Moreover, no gel is left behind post treatment, which will eliminate any damage potential. The system is not impacted with the presence of corrosion products, where diverting system will not function without effective pickling and tubular cleanup. Lab results showed that the new in-situ foam generation system was very effective on both dolomite and calcite cores. The system creates high back pressure when foam is generated, which significantly diverts the acid stages to stimulate other intervals. Moreover, the new system minimizes acid leak-off and penetration. Open completing the job, the foam collapse leaving no left behind any damaging material. Field application of the in-situ foam generating system showed high success rate and outperformed other diversion mechanisms. The well gain was up to 18 folds of the original well injectivity.

Successful Application of Unique High-Density Water-Based Drilling Fluid Used in Zhaotong Shale Gas Horizontal Wells

2015 ◽  
Author(s):  
Lili Yan ◽  
Congjun Li ◽  
Zhilei Zhang ◽  
Jianhua Wang ◽  
Xianguang Xu ◽  
...  
Keyword(s):  
Shale Gas ◽  
Drilling Fluid ◽  
Horizontal Wells ◽  
High Density ◽  
Water Based
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