Vertical Interference Test in Wells With Downhole Water Sink Completions

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Ephim Shirman ◽  
Andrew Wojtanowicz
Keyword(s):  
Analysis Method ◽  
Type Curves ◽  
Two Fluids ◽  
Testing Method ◽  
Water Coning ◽  
Interference Test ◽  
Permeability Anisotropy ◽  
Downhole Water Sink ◽  
Well Completions ◽  
Vertical Interference Test

Downhole water sink (DWS) well completions segregate production in the wellbore by producing water from the underlying aquifer and oil—from the oil zone of the reservoir. A pump drains water from the bottom completion to create a pressure drawdown that prevents water from coning up to the top, oil producing zone. Successful application of DWS technology in wells with water-coning problem requires effective isolation between the top and bottom completions of the well. Since DWS technology requires dual completion, the completion is configured for vertical interference testing. The problem is that such test involves flow of two fluids, water and oil. This paper presents a new mathematical model and analysis method for vertical interference testing using top completion (in the oil leg) for production and bottom completion (in the water leg) for observation. The model is analytical and accommodates partial penetration and permeability anisotropy. The analysis method employs a family of type-curves. Examples of possible applications of this new testing method are also shown in this paper.

Inflow Performance and Pressure Interference in Dual-Completed Wells With Water Coning Control

2002 ◽  
Vol 124 (4) ◽  
pp. 253-261 ◽  
Author(s):  
Andrew K. Wojtanowicz ◽  
Ephim I. Shirman
Keyword(s):  
Three Dimensional ◽  
Maximum Pressure ◽  
Water Drainage ◽  
Two Phase ◽  
Drainage Rate ◽  
Water Coning ◽  
Water Cut ◽  
Downhole Water Sink ◽  
Inflow Performance ◽  
Well Completions

Dual-completed wells with Downhole Water Sink (DWS) are used for water coning control in oil reservoirs with bottom water drive. In DWS wells, the second (bottom) completion—placed in the water column—is used for draining water. This prevents the water cone invasion and allows free oil inflow in the top completion. The decision on using DWS or a conventional (single-completed) well is based upon deliverability comparison of the two wells. This paper shows how to describe DWS well deliverability in terms of the top and bottom production rates, water cut, and pressure drawdown. Also, the effect of pressure interference between two well completions on deliverability limits has been studied and qualified experimentally. DWS well deliverability depends on two variables, pressure drawdown and water drainage rate, and is described by a three-dimensional Inflow Performance Domain (IPD). Visual-Basic software based on a new analytical model of IPD has been developed to calculate critical (fluid breakthrough) rates for oil and water. The critical rates identify inflow conditions to the well’s completions—single or two-phase inflow. Also calculated are the values of water cut and maximum pressure drawdown at the well. An example demonstrates the procedure and a complete IPD plot. The experimental study, using a Hele-Shaw physical model of DWS well, demonstrates the reduction of well’s deliverability caused by pressure interference from the second (bottom) completion. The experiments have shown, however, that the deliverability decrease is small and over-compensated by the increase of oil rate due to simultaneous reduction of water cut.

scholarly journals Investigation on Interference Test for Wells Connected by a Large Fracture

2019 ◽  
Vol 9 (1) ◽  
pp. 206
Author(s):  
Guofeng Han ◽  
Yuewu Liu ◽  
Wenchao Liu ◽  
Dapeng Gao
Keyword(s):  
Double Porosity ◽  
Flow In Porous Media ◽  
Connection Form ◽  
Analysis Model ◽  
Pressure Derivative ◽  
Type Curve ◽  
Type Curves ◽  
Multi Stage ◽  
Interference Test ◽  
Straight Lines

Pressure communication between adjacent wells is frequently encountered in multi-stage hydraulic fractured shale gas reservoirs. An interference test is one of the most popular methods for testing the connectivity of a reservoir. Currently, there is no practical analysis model of an interference test for wells connected by large fractures. A one-dimensional equation of flow in porous media is established, and an analytical solution under the constant production rate is obtained using a similarity transformation. Based on this solution, the extremum equation of the interference test for wells connected by a large fracture is derived. The type-curve of pressure and the pressure derivative of an interference test of wells connected by a large fracture are plotted, and verified against interference test data. The extremum equation of wells connected by a large fracture differs from that for homogeneous reservoirs by a factor 2. Considering the difference of the flowing distance, it can be concluded that the pressure conductivity coefficient computed by the extremum equation of homogeneous reservoirs is accurate in the order of magnitude. On the double logarithmic type-curve, as time increases, the curves of pressure and the pressure derivative tend to be parallel straight lines with a slope of 0.5. When the crossflow of the reservoir matrix to the large fracture cannot be ignored, the slope of the parallel straight lines is 0.25. They are different from the type-curves of homogeneous and double porosity reservoirs. Therefore, the pressure derivative curve is proposed to diagnose the connection form of wells.

Vertical Interference Testing Method Using Dual Completions with Downhole Water Sink

2000 ◽  
Author(s):  
Luis R. Ramos ◽  
Ephim I. Shirman ◽  
Andrew K. Wojtanowicz
Keyword(s):  
Testing Method ◽  
Downhole Water Sink

scholarly journals Elderly's Meaningful Occupation As A Rehabilitation Mean In Occupational Therapy

2020 ◽  
Vol 1 (1) ◽  
pp. 7-21
Author(s):  
Aida Kalashyan
Keyword(s):  
Qualitative Research ◽  
Elderly People ◽  
Quantitative Research ◽  
Research Question ◽  
Well Being ◽  
The Elderly ◽  
Analysis Method ◽  
Testing Method ◽  
Quantitative And Qualitative Research ◽  
Therapy Effect

The aim of the study is to find out the importance of occupation in the lives of elderly people and identify the occupation therapy effect of their well-being. The survey was conducted on quantitative and qualitative research for the collection of research data. For quantitative research was used a testing method with the use of Chris Mayer's and Interests questionnaires. Qualitative research is based on quantitative research results, accordingly has been designed a questionnaire that has helped to reveal the research question. MS Excel program was applied for analyzing quantitative research, and thematic analysis method for qualitative research. The results of the research reveal that most elderly people do not have meaningful occupation, do not do any kind of job, do not engage in their preferred occupation. These circumstances are interpreted as the work for the livelihoods organized by the institution. In addition, this was explained not only by the lack of alternative occupation options in the institution, but also by the lack of desire of the elderly. The elderly voiced also financial and health problems that hindered their involvement in their preferred occupation.

Utilizing Advanced Logs for Flow Unit Classification in Vertical Interference Test Modeling

2019 ◽  
Author(s):  
Arvind Kumar ◽  
Arjit Gidwani ◽  
Suraj Singh ◽  
Tety Wydiabhakti ◽  
Siddhartha Mishra
Keyword(s):  
Flow Unit ◽  
Interference Test ◽  
Vertical Interference Test

scholarly journals Pengaruh Daya Tarik Wisata Terhadap Niat Berkunjung Ulang Melalui Kepuasan Wisatawan (Studi pada wisatawan “Kampung Warna Warni” di Kota Malang)

2018 ◽  
Vol 25 (1) ◽  
pp. 12
Author(s):  
Mega Mirasaputri Cahyanti
Keyword(s):  
Significant Influence ◽  
Research Method ◽  
Descriptive Analysis ◽  
Tourist Attraction ◽  
Direct Influence ◽  
Analysis Method ◽  
Testing Method ◽  
Tourist Satisfaction ◽  
Repeated Visit ◽  
Significant Direct Effect

This research has several objectives: (1) Knowing the influence of tourist attraction to the satisfaction of tourists,(2) Knowing the effect of tourist satisfaction on the intention of repeated visit, and (3) Knowing the direct influence of tourist attraction to the intention of the visit of tourists in Kampung Warna Warni Kota Malan. This research method using quantitative approach with descriptive analysis method, data collecting technique by spreading questionnaires to 100 respondents at tourist sites and hypothesis testing method using path analysis. The result shows that: (1) The tourist attraction has a significant effect on the satisfaction of the tourists (H1 accepted), (2)  The satisfaction of tourists has a significant influence on the intention of the tourist visiting in Kampung Warna Warni Malang (H2 accepted), and (3) Tourist attraction has a significant direct effect on the intention of the visit of tourists in Kampung Warna Warni Malang (H3 accepted). And the results of testing Sobel show that the variable satisfaction of tourists mediate tourist attraction and intention to re-visit the Kampung Warna Warni Malang.

scholarly journals Testing and evaluation of railway pavement construction stiffness based on a new testing method

2018 ◽  
Vol 2018 (6) ◽  
pp. 32-42
Author(s):  
Juliusz Sołkowski ◽  
Dawid Siemieński
Keyword(s):  
Dynamic Load ◽  
Falling Weight Deflectometer ◽  
Analysis Method ◽  
Testing Method ◽  
Road Pavement ◽  
Pavement Evaluation ◽  
Pavement Construction ◽  
The 1960S ◽  
Falling Weight ◽  
Testing And Evaluation

This project is based on search for the method of measuring and evaluation the railway pavement construction. The authors note some analogies between road and railway, both in terms of construction and the dynamic load. Already in the 1960s a method for measuring road pavement deflections under dynamic load was developed using Falling Weight Deflectometer. During years the device and the results analysis method were developed and currently commonly used. The FWD device was adapted for use on railway pavement construction. The first tests were done in the field and have brought reliable results. The device and measuring and pavement evaluation methods are under development.

Sign in / Sign up

Export Citation Format

Share Document