Experiments on Blocking Ability of Nitrogen Foam and Its Application in Anti-Water-Coning

Pang, Zhanxi; Liu, H.-Q.; Liu, X.-L.

doi:10.1080/10916460903030490

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…Once the water begins to rise, the well should be immediately shut in and kept shut-in until the oil/water interface returns to the previous level under the action of gravitational forces, or else some other measures should be taken [3,[20][21][22][23][24][25][26][27] to minimize or slow down the undesirable impact of bottom-water cresting. The results of this study are also applicable to bottom-water gas reservoirs and anisotropic reservoirs.…”

Section: Numerical Simulationmentioning

confidence: 99%

Study of Startup Parameters Triggering Water Cresting in Wells in Bottom-Water Reservoirs

Yue

Chen

Liu

et al. 2015

Chem Technol Fuels Oils

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Based on the description of the dynamic process of bottom-water cresting in horizontal wells, we have identified a startup state that precedes the water rise. We present formulas helping to understand the nature of the process of bottom-water cresting toward a horizontal well, and to analyze the cresting process in relation to well production rate. The goal of this paper is to improve understanding of bottom-water cresting toward a horizontal well.

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Section: Numerical Simulationmentioning

confidence: 99%

Study of Startup Parameters Triggering Water Cresting in Wells in Bottom-Water Reservoirs

Yue

Chen

Liu

et al. 2015

Chem Technol Fuels Oils

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“…Considering the drilling conditions, recyclable nitrogen-foam used as a circulating medium can meet drilling requirements [6][7][8]. Since the reservoir layer of the Daniudi gas field has a vertical depth of about 2,700 m and the formation pressure coefficient is 0.83-0.95, only two circulation media, gas and foam can be used.…”

Section: Optimum Differential Pressure and Drilling Fluidmentioning

confidence: 99%

“…However, when gas is used, the borehole is dried and Electromagnetic Measurement While Drilling (EMWD) cannot be used, so only foam is practical. Considering the drilling conditions, recyclable nitrogen-foam used as a circulating medium can meet drilling requirements [6][7][8].…”

Section: Optimum Differential Pressure and Drilling Fluidmentioning

confidence: 99%

Research and Application of Recyclable Nitrogen Foam Horizontal Well Drilling Technology in the Daniudi Gas Field

Tang

Xiong

et al. 2014

J Surfact & Detergents

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The Daniudi gas field is typically rich in ultra‐low permeability gas reservoirs in China, but its development is difficult. In this paper, pilot implementation of underbalanced horizontal well drilling technology was used in the H1 gas reservoir to develop the proved reserves effectively. Owing to the limitations of drilling technology and environmental protection, the recyclable nitrogen‐foam was ultimately chosen as a circulating medium. Through theoretical analysis and extensive laboratory tests, the optimal foaming agent composed of α‐olefin sulfonate and coco amine oxide was selected among six anionic surfactants/zwitterionic surfactants systems. The developed recyclable nitrogen‐foam has high salt resistance, temperature resistance and cycle performance, but weaker oil resistance. After the recyclable nitrogen‐foam horizontal well drilling technology was used in the H1 gas reservoir, the average rate of penetration of horizontal section increased by 118 %, ignition could be achieved during drilling and natural gas was of great potential for production. It was the first time to increase natural gas production capacity in the H1 gas reservoir using recyclable nitrogen‐foam horizontal well drilling technology. Successful application of this technology provides technical reserves for the effective development of the H1 gas reservoir.

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“…Both horizontal branches are 300m long. The upper one is located 4.5 m below the top of the reservoir and the lower one is located 17.5 m below the top, which means separation distance between it and the water/oil contact is only 2.5 m. Gas liquid ratio and mass fraction of surfactant solution in this study are set to 1:1 and 0.5%, respectively, according to the optimized results of previous physical experiments [17]. The mechanism model considering foam generation, coalescence, and oil acceleration on foam decay by adding a component lamella is chosen to simulate this process precisely.…”

Section: Reservoir Description and Model Buildingmentioning

confidence: 99%

Numerical Simulation of Nitrogen Foam Injection to Control Water Cresting by Bilateral Horizontal Well in Bottom Water Reservoir

Liu¹,

Liu²,

Pang³

2012

TOEFJ

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By numerical simulation, a bilateral horizontal well is placed in a crude oil reservoir with bottom water. The upper branch which is located near the top of the reservoir is for producing and the lower branch which is located near the oil water contract is for nitrogen foam injecting. Packers are used to control the alternation between productions and injections. When water cut of the upper branch reaches a certain value, this branch is shut and nitrogen foam is injected into the lower branch. After two days' soaking, the upper branch is opened to produce again. This process can be repeated for several times along with the reservoir development. The main mechanisms of this development style are analyzed, and different injecting methods including injecting foam in the lower branch (IFLB), injecting foam in the upper branch (IFUB), and injecting nitrogen gas in the lower branch (INLB) are contrasted. The effect of reservoir heterogeneity on the performance of IFLB is also considered. Various stochastic realizations with different shale contents and correlation lengths are established by sequential indicator simulation method. In order to explain the large variations occurring in the realizations with same shale content and correlation length, the definition 'below well region' (BWR) is put forward and two groups of models with different BWR are built to simulate the performance of IFLB. As expected, the geological condition of BWR has a great effect on the performance of IFLB. If the shale content of BWR is low, good performance can be obtained with any combination of shale content and correlation length for the remaining region. On the contrary, if shale content and continuity of BWR are high, the performance of IFLB will significantly decrease.

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Experiments on Blocking Ability of Nitrogen Foam and Its Application in Anti-Water-Coning

Cited by 11 publications

References 11 publications

Study of Startup Parameters Triggering Water Cresting in Wells in Bottom-Water Reservoirs

Study of Startup Parameters Triggering Water Cresting in Wells in Bottom-Water Reservoirs

Research and Application of Recyclable Nitrogen Foam Horizontal Well Drilling Technology in the Daniudi Gas Field

Numerical Simulation of Nitrogen Foam Injection to Control Water Cresting by Bilateral Horizontal Well in Bottom Water Reservoir

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