scholarly journals Research on Water Cone Behavior in a Heavy Oil Reservoir with Bottom Water Considering the Starting Pressure Gradient

ACS Omega ◽  
2020 ◽  
Vol 5 (27) ◽  
pp. 16841-16847
Author(s):  
Kai Wang ◽  
Ke Li ◽  
Yufei Gao ◽  
Yue Pan ◽  
Xianwen Zhang ◽  
...  
Keyword(s):  
Pressure Gradient ◽  
Heavy Oil ◽  
Bottom Water ◽  
Oil Reservoir ◽  
Heavy Oil Reservoir ◽  
Starting Pressure Gradient

Study on Water Cone Behavior in Heavy Oil Reservoir with Bottom Water through Numerical Simulation

2019 ◽  
Vol 42 (15) ◽  
pp. 1809-1820 ◽  
Author(s):  
Wang Kai ◽  
Zhou Wensheng ◽  
Li Ke ◽  
Liu Chen ◽  
Geng Yanhong ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Heavy Oil ◽  
Bottom Water ◽  
Oil Reservoir ◽  
Heavy Oil Reservoir

scholarly journals Evaluation of Early High Speed Development of Bottom Water Heavy Oil Reservoir

2020 ◽  
Vol 08 (11) ◽  
pp. 201-208
Author(s):  
Xiujuan Zhao ◽  
Songru Mou ◽  
Jie Tan ◽  
Bowei Liu ◽  
Enhui Sun
Keyword(s):  
Heavy Oil ◽  
High Speed ◽  
Bottom Water ◽  
Oil Reservoir ◽  
Heavy Oil Reservoir

scholarly journals A well selection method of CO2 huff and puff in heavy oil reservoir with edge and bottom water based on water cut

2021 ◽  
Vol 329 ◽  
pp. 01069
Author(s):  
Jia Wang ◽  
Tongjing Liu ◽  
Hengyu Shi ◽  
Pengxiang Diwu ◽  
Jian Zhou ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Bottom Water ◽  
Selection Method ◽  
Evaluation Index ◽  
Oil Reservoir ◽  
Effective Measure ◽  
Potential Wells ◽  
Water Based ◽  
Heavy Oil Reservoir ◽  
Water Cut

The water cut of heavy oil reservoir with edge and bottom water rises rapidly and the recovery degree of crude oil is low. CO2 huff and puff is an effective measure to improve the recovery of this kind of reservoir, and scientific well selection is the premise of the measure effect. Because the existing well selection methods of CO2 huff and puff in heavy oil reservoir with edge and bottom water mostly take the oil increase of oil well as the evaluation index, ignoring the characterization of well water cut after huff and puff, it is unable to accurately screen all potential wells. Therefore, a quantitative well selection method of CO2 huff and puff in heavy oil reservoir with edge and bottom water based on water cut is proposed. The method is based on fuzzy comprehensive evaluation theory and analytic hierarchy process, and takes the water cut after CO2 huff and puff as the evaluation index. Several groups of typical models are designed to screen the sensitive factors and laws of CO2 huff and puff well selection in heavy oil edge and bottom water reservoir from three aspects of geology, water production law and technology. Than the judgment matrix is established. There is little interference from human factors in the process of well selection, and the rationality of the method has been verified by the effect of field actual well measures. This method is helpful to improve the well selection method system of CO2 huff and puff in this kind of reservoir, and is a reasonable supplement to the existing well selection method which takes the oil increment as the only evaluation index.

Analyzing Edge Water Drive Laws of Offshore Heavy Oil Reservoir with Physical Experiment and Numerical Simulation

2014 ◽  
Author(s):  
Q.. Feng ◽  
S.. Li ◽  
Y.. Su ◽  
Y.. Liu ◽  
X.. Han
Keyword(s):  
Pressure Gradient ◽  
Heavy Oil ◽  
Experimental Results ◽  
Maximum Pressure ◽  
Oil Reservoir ◽  
Recovery Efficiency ◽  
Vertical Well ◽  
Advantages And Disadvantages ◽  
Heterogeneous Reservoir ◽  
Heavy Oil Reservoir

Abstract The existence of edge water has both advantages and disadvantages for the development of offshore heavy oil reservoir. On one hand, edge water invasion could supplement the reservoir pressure which is in favor of the oil production, while on the other hand, the asymmetrical invasion of the edge water could result in the quick increase of water cut for production wells and the consequent low oil recovery efficiency. For the purpose of better understanding edge water drive laws of offshore heavy oil reservoir and their effects on remaining oil distribution, several two dimensional visible physical models with different well-types, which are based on geological features and development characteristics of a certain offshore heavy oil reservoir in China, have been built to make the investigation. The experimental results are analyzed and shown as follows. Firstly, edge water mainly encroaches through areas with the maximum pressure gradient in homogeneous reservoir. But for heterogeneous reservoir, edge water would encroach through both high permeability section and areas with maximum pressure gradient. Meanwhile, compared with heterogeneous reservoir, there is more obvious water/oil front and higher reserve recovery degree in homogeneous reservoir under the same conditions. Secondly, the degree of reserve recovery obtained by double vertical wells is much higher than that obtained by single vertical well. So, increasing the number of production well is conducive to the improvement of reservoir recovery degree. Lastly, the recovery efficiency for horizontal well is much higher than that of the vertical well. In addition, Suizhong 36-1 Oilfield, an offshore heavy oil reservoir with edge water drive, has been numerical simulated. The simulated results of edge water drive laws are consistent with the experimental results, which could provide a useful guidance for the development of offshore heavy oil reservoir with edge-water drive.

An Innovated Water Shutoff Technology in Offshore Carbonate Reservoir

2021 ◽  
Author(s):  
Yong Yang ◽  
Xiaodong Li ◽  
Changwei Sun ◽  
Yuanzhi Liu ◽  
Renkai Jiang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Bottom Water ◽  
High Water ◽  
Carbonate Reservoir ◽  
Oil Reservoir ◽  
Water Production ◽  
Water Shutoff ◽  
Water Breakthrough ◽  
Heavy Oil Reservoir ◽  
Water Cut

Abstract The problem of water production in carbonate reservoir is always a worldwide problem; meanwhile, in heavy oil reservoir with bottom water, rapid water breakthrough or high water cut is the development feature of this kind of reservoir; the problem of high water production in infill wells in old reservoir area is very common. Each of these three kinds of problems is difficult to be tackled for oilfield developers. When these three kinds of problems occur in a well, the difficulty of water shutoff can be imagined. Excessive water production will not only reduce the oil rate of wells, but also increase the cost of water treatment, and even lead to well shut in. Therefore, how to solve the problem of produced water from infill wells in old area of heavy oil reservoir with bottom water in carbonate rock will be the focus of this paper. This paper elaborates the application of continuous pack-off particles with ICD screen (CPI) technology in infill wells newly put into production in brown field of Liuhua, South China Sea. Liuhua oilfield is a biohermal limestone heavy oil reservoir with strong bottom water. At present, the recovery is only 11%, and the comprehensive water cut is as high as 96%. Excessive water production greatly reduces the hydrocarbon production of the oil well, which makes the production of the oilfield decrease rapidly. In order to delay the decline of oil production, Liuhua oilfield has adopted the mainstream water shutoff technology, including chemical and mechanical water shutoff methods. The application results show that the adaptability of mainstream water shutoff technology in Liuhua oilfield needs to be improved. Although CPI has achieved good water shutoff effect in the development and old wells in block 3 of Liuhua oilfield, there is no application case in the old area of Liuhua oilfield which has been developed for decades, so the application effect is still unclear. At present, the average water cut of new infill wells in the old area reaches 80% when commissioned and rises rapidly to more than 90% one month later. Considering that there is more remaining oil distribution in the old area of Liuhua oilfield and the obvious effect of CPI in block 3, it is decided to apply CPI in infill well X of old area for well completion. CPI is based on the ICD screen radial high-speed fluid containment and pack-off particles in the wellbore annulus to prevent fluid channeling axially, thus achieving well bore water shutoff and oil enhancement. As for the application in fractured reef limestone reservoir, the CPI not only has the function of wellbore water shutoff, but also fills the continuous pack-off particles into the natural fractures in the formation, so as to achieve dual water shutoff in wellbore and fractures, and further enhance the effect of water shutoff and oil enhancement. The target well X is located in the old area of Liuhua oilfield, which is a new infill well in the old area. This target well with three kinds of water problems has great risk of rapid water breakthrough. Since 2010, 7 infill wells have been put into operation in this area, and the water cut after commissioning is 68.5%~92.6%. The average water cut is 85.11% and the average oil rate is 930.92 BPD. After CPI completion in well X, the water cut is only 26% (1/3 of offset wells) and the oil rate is 1300BPD (39.6% higher than that of offset wells). The target well has achieved remarkable effect of reducing water and increasing oil. In addition, in the actual construction process, a total of 47.4m3 particles were pumped into the well, which is equivalent to 2.3 times of the theoretical volume of the annulus between the screen and the borehole wall. Among them, 20m3 continuous pack-off particles entered the annulus, and 27.4m3 continuous pack-off particles entered the natural fractures in the formation. Through the analysis of CPI completed wells in Liuhua oilfield, it is found out that the overfilling quantity is positively correlated to the effect of water shutoff and oil enhancement.

An Effective Method to Improve Recovery of Heavy Oil Reservoir with Bottom Water Drive

2005 ◽  
Author(s):  
Binshan Ju ◽  
Shugoa Dai ◽  
Tailiang Fan ◽  
Xiaodong Wang ◽  
Haiqing Wu
Keyword(s):  
Heavy Oil ◽  
Bottom Water ◽  
Oil Reservoir ◽  
Heavy Oil Reservoir

scholarly journals Numerical Simulation Study on Steam-Assisted Gravity Drainage Performance in a Heavy Oil Reservoir with a Bottom Water Zone

Energies ◽  
2017 ◽  
Vol 10 (12) ◽  
pp. 1999 ◽  
Author(s):  
Jun Ni ◽  
Xiang Zhou ◽  
Qingwang Yuan ◽  
Xinqian Lu ◽  
Fanhua Zeng ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Simulation Study ◽  
Heavy Oil ◽  
Bottom Water ◽  
Gravity Drainage ◽  
Oil Reservoir ◽  
Steam Assisted Gravity Drainage ◽  
Water Zone ◽  
Heavy Oil Reservoir

Influence Factor Research of Artificial-Interlayer Shape in Bottom-Water Heavy Oil Reservoir

2012 ◽  
Vol 524-527 ◽  
pp. 1245-1251
Author(s):  
Fu Lin Wang
Keyword(s):  
Numerical Simulation ◽  
Heavy Oil ◽  
Bottom Water ◽  
Influence Factor ◽  
Simulation Method ◽  
Oil Reservoir ◽  
Oil Viscosity ◽  
Numerical Simulation Method ◽  
Volume Viscosity ◽  
Heavy Oil Reservoir

Artificial barrier morphology distribution mechanism and the EOR factors of he heavy oil reservoir with bottom water is be researched, Through numerical calculation and numerical simulation method. The model for calculating the height of the artificial-interlayer with curvilinear side surface is established. This model quantitatively describes the relationship between the artificial-interlayer height and oil yield, reservoir thickness, radial distance from well axis, reservoir permeability and crude oil viscosity. Maximum artificial-interlayer height and radius, the artificial-interlayer heights at different radial distances can be obtained according to this model. Through the case, the characteristics of artificial-interlayer form are analyzed, and rules of artificial-interlayer conformation are obtained when artificial-interlayer liquid with different volume, viscosity and race are injected. The further research are carried out through numerical simulation method, and the theoretical results are be Compared and verified which deepen the study of artificial-interlayer shape influence factor . Results show that: the volume and position of injected gel have more influence on development effect is obviously, the interlayer is designed 3M over the oil-water interface and thickness perforated is 6m is better, which provides a reference for the development of bottom-water reservoir.

Sign in / Sign up

Export Citation Format

Share Document