Hongsha Xiao¹, Ruihan Zhang^2,*, Man Chen¹, Cui Jing¹, Shangjun Gao¹, Chao Chen¹, Huiyan Zhao¹, Xin Huang^2,*, Bo Kang³

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.7, pp. 1803-1815, 2023, DOI:10.32604/fdmp.2023.026143

Abstract The production performances of a well with a shale gas reservoir displaying a complex fracture network are simulated. In particular, a micro-seismic cloud diagram is used to describe the fracture network, and accordingly, a production model is introduced based on a multi-scale flow mechanism. A finite volume method is then exploited for the integration of the model equations. The effects of apparent permeability, conductivity, Langmuir volume, and bottom hole pressure on gas well production are studied accordingly. The simulation results show that ignoring the micro-scale flow mechanism of the shale gas leads to underestimating the well gas production. It is… More > Graphic Abstract

Mingjing Lu^1,2,*, Zenglin Wang^1,3, Aishan Li¹, Liaoyuan Zhang¹, Bintao Zheng¹, Zilin Zhang¹

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.5, pp. 1269-1281, 2023, DOI:10.32604/fdmp.2023.023188

Abstract A mathematical model for the gas-water two-phase flow in tight gas reservoirs is elaborated. The model can account for the gas slip effect, stress sensitivity, and high-speed non-Darcy factors. The related equations are solved in the framework of a finite element method. The results are validated against those obtained by using the commercial software CMG (Computer Modeling Group software for advanced recovery process simulation). It is shown that the proposed method is reliable. It can capture the fracture rejection characteristics of tight gas reservoirs better than the CMG. A sensitivity analysis of various control factors (initial water saturation, reservoir parameters,… More >

Guangsheng Liu^1,2, Qingming Gan^1,2, Wen Wu³, Haitao Yang^1,2, Yiming Lv^1,2, Wenhao Cui^1,2, Wei Lin^4,*

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.5, pp. 1203-1214, 2023, DOI:10.32604/fdmp.2023.022022

Abstract The finite element method has been applied to simulate the dynamics of a water plugging string in a complex horizontal well of a low-permeability oilfield. The force associated with the pipe string and the packer has been determined under the sucking action of the oil well pump. Such analysis has been conducted for a real drilling well, taking into account the process of lifting, lowering, unblocking and water plugging. Comparison between field measured data and simulation data indicates that the model is reliable and accurate. The packer creep effect under different pressure differences has also been investigated in the framework… More >

Yuhui Zhou^1,2,3,*, Shichang Ju⁴, Qijun Lyu⁴, Hongfei Chen⁴, Xuebiao Du⁴, Aiping Zheng⁴, Wenshun Chen⁴, Ning Li⁴

FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 245-259, 2023, DOI:10.32604/fdmp.2023.019971

Abstract It is known that the pore media characteristics of glutenite reservoirs are different from those of conventional sandstone reservoirs. Low reservoir permeability and naturally developed microfractures make water injection in this kind of reservoir very difficult. In this study, new exploitation methods are explored. Using a real glutenite reservoir as a basis, a three-dimensional fine geological model is elaborated. Then, combining the model with reservoir performance information, and through a historical fitting analysis, the saturation abundance distribution of remaining oil in the reservoir is determined. It is shown that, using this information, predictions can be made about whether the considered… More >

Zhenfeng Zhao¹, Bin Li¹, Zubo Su¹, Lijing Chang¹, Hongzheng Zhu¹, Ming Liu¹, Jialing Ma^2,*, Fan Wang¹, Qianwan Li¹

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.6, pp. 1781-1794, 2022, DOI:10.32604/fdmp.2022.019998

Abstract Often oilfield fractured horizontal wells produce water flowing in multiple directions. In this study, a method to identify such channeling paths is developed. The dual-medium model is based on the principle of inter-well connectivity and considers the flow characteristics and related channeling terms. The Lorentz curve is drawn to qualitatively discern the geological type of the low-permeability fractured reservoir and determine the channeling direction and size. The practical application of such an approach to a sample oilfield shows that it can accurately identify the channeling paths of the considered low-permeability fractured reservoir and predict production performances according to the inter-well… More >

Chenyang Shi^1,2,3, Fankun Meng^1,2,3,*, Hongyou Zhang⁴, HuiJiang Chang⁴, Xun Zhong^1,2,3, Jie Gong^1,2,3, Fengling Li⁵

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.5, pp. 1441-1468, 2022, DOI:10.32604/fdmp.2022.019788

Abstract As current calculation models for inter-well connectivity in oilfields can only account for vertical wells, an updated model is elaborated here that can predict the future production performance and evaluate the connectivity of horizontal wells (or horizontal and vertical wells). In this model, the injection-production system of the considered reservoir is simplified and represented with many connected units. Moreover, the horizontal well is modeled with multiple connected wells without considering the pressure loss in the horizontal direction. With this approach, the production performance for both injection and production wells can be obtained by calculating the bottom-hole flowing pressure and oil/water… More >

Qinghua Wang¹, Junzheng Yang¹, Wei Luo^2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.1, pp. 215-233, 2021, DOI:10.32604/fdmp.2021.011914

Abstract Well completions are generally used to connect a reservoir to the surface so that fluids can be produced from or injected into it. With these systems, pipe flows are typically established in the horizontal sections of slotted screen completions and inflow control device (ICD) completions; moreover, an annular flow exists in the region between the pipe and the borehole wall. On the basis of the principles of mass and momentum conservation, in the present study, a coupling model considering the variable mass flow of the central tubing, the variable mass flow of the annular tubing and the reservoir seepage is… More >

Shan Jin^1,2,3, Xiaohong Bai⁴, Wei Luo^1,2,3,*, Li Li⁴, Ruiquan Liao^1,2,3

FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.6, pp. 1229-1242, 2020, DOI:10.32604/fdmp.2020.011051

Abstract With the increasing number of horizontal wells with low pressure, low yield, and water production, the phenomenon of water and liquid accumulation in gas wells is becoming progressively more serious. In order to fix these issues, it is necessary to improve existing drainage and gas recovery technologies, increase the fluid carrying capacity of these wells, and ensure that the bottom-hole airflow has enough energy to transport the liquid to the wellhead. Among the many techniques of drainage and gas recovery, the gas lift has recently become a popular method. In the present study, through the simulation of the entire horizontal… More >

Minxuan Li¹, Jing Sun^1,*, Dehua Liu¹, Yang Li¹, Kuidong Li², Wei Liu², Jialin Xiao², Jiani Hu³

FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.5, pp. 993-1005, 2020, DOI:10.32604/fdmp.2020.010443

Abstract Existing “evaluation indicators” are selected and combined to build a model to support the optimization of shale gas horizontal wells. Towards this end, different “weighting methods”, including AHP and the so-called entropy method, are combined in the frame of the game theory. Using a relevant test case for the implementation of the model, it is shown that the horizontal section of the considered well is in the middle sweet spot area with good physical properties and fracturing ability. In comparison with the FSI (flow scanner Image) gas production profile, the new model seems to display better abilities for the optimization… More >

Dongkwon Han, Sunil Kwon^*

FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 411-424, 2020, DOI:10.32604/fdmp.2020.08388

Abstract This paper presents the development and application of a production data analysis software that can analyze and forecast the production performance and reservoir properties of shale gas wells. The theories used in the study were based on the analytical and empirical approaches. Its reliability has been con- firmed through comparisons with a commercial software. Using transient data relating to multi-stage hydraulic fractured horizontal wells, it was confirmed that the accuracy of the modified hyperbolic method showed an error of approximately 4% compared to the actual estimated ultimate recovery (EUR). On the basis of the developed model, reliable productivity forecasts have… More >