Application of Underbalanced Coiled Tubing Drilling Technology to Enhance Gas Production in Deep Carbonate Reservoirs

2018 ◽  
Author(s):  
Pablo Guizada ◽  
Zillur Rahim ◽  
Bodour Aliraani
Keyword(s):  
Gas Production ◽  
Carbonate Reservoirs ◽  
Coiled Tubing ◽  
Drilling Technology

Comparative analysis of production potential in Bulla-deniz and Umid gas-condensate fields

2020 ◽  
pp. 21-26
Author(s):  
E.H. Ahmadov ◽  
Keyword(s):  
Oil And Gas ◽  
Reduction Rate ◽  
Chemical Properties ◽  
Gas Production ◽  
Layer System ◽  
Reservoir Properties ◽  
Technical Parameters ◽  
Recovery Curves ◽  
Well Model ◽  
Drilling Technology

The paper studies the reduction rate of gas production in the wells of Bulla-deniz field drilled to VIII horizon. With this purpose, geological (reservoir properties, oil-gas saturation, net thickness, formation pressure and temperature, formation heterogeneity, multi-layer system, tectonic faults, physical-chemical properties of oil and gas etc.) and technological (well structure, measuring and transportation system, well operation regime, drilling technology etc.) conditions of formation were analyzed and the well model of VII and VIII horizons of Bulla-deniz field using these geological and technical parameters developed as well. For the estimation of impact of geological and technical aspects on production, sensitivity analysis was carried out on the models. The suggestions for elaboration of uncertainty of geological and technical parameters affecting production dynamics were developed. To reveal the reasons for production differences of the wells, it was proposed to install borehole manometers, to obtain the data on pressure recovery curves, drainage area, skin-effect impact, permeability and to develop a study plan of bottomhole zone with acid.

Microhole Coiled Tubing Drilling: A Low Cost Reservoir Access Technology

2009 ◽  
Vol 131 (1) ◽  
Author(s):  
Kent Perry
Keyword(s):  
Low Cost ◽  
Cost Savings ◽  
Field Testing ◽  
Widespread Application ◽  
Unconventional Gas ◽  
Drilling Rig ◽  
Coiled Tubing ◽  
Drilling Technology ◽  
Drilling Rigs ◽  
The U.S

Although the microhole coiled tubing drilling rigs have been used extensively in Canada, their application in the U.S. has been very limited. In an effort to introduce this technology to the U.S. operators, GTI, with the support of DOE∕NETL, has completed a successful field testing of the coiled tubing microhole drilling technology. In this paper we report results of field testing of the system in 25 wells drilled in the Niobrara unconventional gas play of Kansas and Colorado. The objective of the field test was to measure and document the rig performance under actual drilling conditions. In these tests, a coiled tubing drilling rig (designed and built by T Gipson with Advanced Drilling Technologies Inc.) was utilized. The rig operations have continued to improve to the point where it now drills a 3100ft well in a single day. Well cost savings of approximately 30% over conventional rotary well drilling have been documented. A description of the rig and a summary of its performance in the Niobrara unconventional gas play are included. In addition, an estimate of economic advantages of widespread application of microhole drilling technology in the lower 48 states is presented.

scholarly journals Flow Simulation and Influence Factors Analysis of CO2 Foam Fracturing in Annulus Injection

2022 ◽  
Vol 9 ◽  
Author(s):  
Hao Li ◽  
Genbo Peng
Keyword(s):  
Fluid Flow ◽  
Small Diameter ◽  
Flow Simulation ◽  
Gas Production ◽  
Fluid Temperature ◽  
Fracturing Fluid ◽  
Two Phase ◽  
Coiled Tubing ◽  
Fracturing Process ◽  
Wellbore Pressure

CO2 foam fracturing fluid is widely used in unconventional oil and gas production because of its easy flowback and low damage to the reservoir. Nowadays, the fracturing process of CO2 foam fracturing fluid injected by coiled tubing is widely used. However, the small diameter of coiled tubing will cause a large frictional pressure loss in the process of fluid flow, which is not beneficial to the development of fracturing construction. In this paper, the temperature and pressure calculation model of gas, liquid, and solid three-phase fluid flow in the wellbore under annulus injection is established. The model accuracy is verified by comparing the calculation results with the existing gas, solid, and gas and liquid two-phase model of CO2 fracturing. The calculation case of this paper shows that compared with the tubing injection method, the annulus injection of CO2 foam fracturing fluid reduces the friction by 3.06 MPa, and increases the wellbore pressure and temperature by 3.06 MPa and 5.77°C, respectively. Increasing the injection temperature, proppant volumetric concentration, and foam quality will increase the wellbore fluid temperature and make the CO2 transition to the supercritical state while increasing the mass flow rate will do the opposite. The research results verify the feasibility of the annulus injection of CO2 foam fracturing fluid and provide a reference for the improvement of CO2 foam fracturing technology in the field.

Microhole Coiled Tubing Drilling: A Low Cost Reservoir Access Technology

2007 ◽  
Author(s):  
Kent F. Perry
Keyword(s):  
Low Cost ◽  
Cost Savings ◽  
Field Testing ◽  
Widespread Application ◽  
Unconventional Gas ◽  
Drilling Rig ◽  
Coiled Tubing ◽  
Drilling Technology ◽  
Drilling Rigs ◽  
The U.S

Although The Microhole Coiled Tubing Drilling rigs have been used extensively in Canada, their application in the U.S. has been very limited. In an effort to introduce this technology to the U.S. operators; GTI, with the support of DOE/NETL has completed successful field testing of coiled tubing microhole drilling technology. In this paper we report results of field testing of the system in 25 wells drilled in the Niobrara unconventional gas play of Kansas and Colorado. The objective of the field test was to measure and document the rig performance under actual drilling conditions. In these tests, a coiled tubing drilling rig (designed and bulit by Tom Gipson with Advanced Drilling Technologies Inc. (ADT)) was utilized. The rig operations have continued to improve to the point where it now drills a 3,100-foot well in a single day. Well cost savings of approximately 30% over conventional rotary well drilling have been documented. A description of the rig and a summary of its performance in the Niobrara unconventional gas play are included. In addition, an estimate of economic advantages of widespread application of microhole drilling technology in the Lower 48 States is presented.

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