Drilling procedures, techniques and test results for a 3.7 km deep, 500°C exploration well, kakkonda, japan

Saito, Seiji; Sakuma, Sumio; Uchida, Toshihiro

doi:10.1016/s0375-6505(98)00034-0

Cited by 36 publications

(12 citation statements)

References 4 publications

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“…This can have negative impact on rheological properties when exposed to high-pressure and high-temperature (HPHT) condition and contaminated with other minerals, which are common in deep drilling. High-pressure and high-temperature (HPHT) wells have bottom hole temperatures of 300°F (150°C) and bottom hole pressures of 10,000 psi (69 MPa) or higher (Saito et al 1998, Saito andSakuma 2000;Kjosnes et al 2003). Present work is aimed to study the effect of CTAB, a cationic surfactant, on control fluid loss, other biocide use elimination, improvement in rheological property and thermal stability of a polymer drilling fluid.…”

Section: Introductionmentioning

confidence: 99%

Cationic surfactant (CTAB) a multipurpose additive in polymer-based drilling fluids

Shettigar

Misra

Patel

2017

J Petrol Explor Prod Technol

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Drilling fluids are designed to assist drilling by minimizing reservoir damage and increasing productivity of pay zone. Excess fluid loss due to degradation of additives of drilling fluids causes a major problem in real-time drilling. Usages of excess biocides are threat to the environment and cause handling problems. Effect of cetyltrimethylammoniumbromide, a cationic surfactant, on rheology, fluid loss and biocide has been studied in a polymer-based drilling fluid. Inhibitive polymer mud was formulated using XC polymer, shale inhibitors like KCl, K 2 SO 4 and CaCO 3 as bridging agent. Rheology and other properties were studied using Fann VG meter, API filter press, mud balance, roller oven apparatus. Dissolved oxygen meter was used to check the microbicidal property of cetyltrimethylammoniumbromide.Addition of cetyltrimethylammoniumbromide increased fluid retention capacity of the fluid even at very low concentration 0.1%(w/v) without affecting the mud properties. Also it is compatible with the commercially available fluid loss preventers like pre-gelatinized starch when used in combination. It also performed well in dissolved oxygen test, suggesting eliminating need of any other biocide to prevent degradation of bio-polymer-based drilling fluid. The dissolved oxygen test results are comparable with commercial available biocides. Thermal stability studies were carried out by using roller oven at different temperatures. It was found suitable for application in high-concentrated brine conditions and at high temperatures up to 120°C without effecting the rheology and shear thinning property of the fluid. Bridging efficiency was investigated by analysing the mud cake using scanning electron microscope.

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Section: Introductionmentioning

confidence: 99%

Cationic surfactant (CTAB) a multipurpose additive in polymer-based drilling fluids

Shettigar

Misra

Patel

2017

J Petrol Explor Prod Technol

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“…BHT (t) = T HM − (b HM ) · log {(t C + t) /t} (1) where T HM is the static formation temperature, log {(t C + t) /t} is the dimensionless Horner time (DHT), and t C and t are the circulation time before shut-in and the time elapsed since the circulation stopped, respectively. One of the problems in Equation (1) is that of being inconsistent with the boundary conditions.…”

Section: Function Derivationmentioning

confidence: 99%

“…This problem may also decrease the fitting quality of the model. We propose the following mathematical model in order to solve this problem in Equation (1). The modified model is expressed as:…”

Section: Function Derivationmentioning

confidence: 99%

“…where is inertia weight; 1 is the cognitive acceleration coefficients, which prompts the attraction of the particle towards its own personal best; 2 is the social acceleration coefficients, which prompts the attraction of the particle towards the swarm best; and 1 and 2 are two random numbers in [0,1].…”

Section: Solutions To the Three Parameters In The New Functionmentioning

confidence: 99%

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Static Formation Temperature Prediction Based on Bottom Hole Temperature

Liu

Chen

et al. 2016

Energies

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Static formation temperature (SFT) is required to determine the thermophysical properties and production parameters in geothermal and oil reservoirs. However, it is not easy to determine SFT by both experimental and physical methods. In this paper, a mathematical approach to predicting SFT, based on a new model describing the relationship between bottom hole temperature (BHT) and shut-in time, has been proposed. The unknown coefficients of the model were derived from the least squares fit by the particle swarm optimization (PSO) algorithm. Additionally, the ability to predict SFT using a few BHT data points (such as the first three, four, or five points of a data set) was evaluated. The accuracy of the proposed method to predict SFT was confirmed by a deviation percentage less than ±4% and a high regression coefficient R 2 (>0.98). The proposed method could be used as a practical tool to predict SFT in both geothermal and oil wells.

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“…A deep drilling WD-1 into the Kakkonda Granite over 500°C in Japan was successfully made by the New Energy and Industrial Technology Development Organization in 1995, and reached the depth of 3729 m below the surface Muraoka et al, 1998;Saito et al, 1998;Doi et al, 1998). Core samples of a higher-temperature granite "with a unique opportunity to study the initial petrographic features just after the solidification of magma" were collected from WD-1 (Sasaki et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Microtexture and compositional variation of alkali feldspars from the Kakkonda granitic pluton, northeast Japan: Implications to the formation processes of granitic texture

Nakano

Sawaki

Sasaki

2014

Journal of Mineralogical and Petrological Sciences

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This paper describes textures and chemical compositions of alkali feldspars to get a clue of the cooling history of the Kakkonda granitic pluton. The Kakkonda pluton of tonalite-granodiorite contains two types of alkali feldspar: one is microperthitic alkali feldspar in the lower-temperature granodiorite of 370°C at the shallower depth (sample C11, 2936-2939 m) and the other is non-microperthitic alkali feldspar in the higher-temperature tonalite over 500°C at the deeper depth (sample C13, 3726-3729 m). The two types of alkali feldspars were examined using an electron microprobe analyzer with an attached cathodoluminescence spectrometer system. The former alkali feldspar is spotted due to microscopic pores and several types of inclusions with microperthitic texture, and the latter is clear and featureless under a microscope. Concentric and/or domain Ba zoning patterns with irregular veins were newly found in both the alkali feldspars. The microperthitic texture in the lower-temperature granodiorite contains two types of Ab-rich plagioclase: one is a bead type of smaller size with rather rounded shape, and the other is a flake type of larger size with irregular shape. The appearance of the microperthitic alkali feldspar is quite different from ordinary patch microperthites with turbidity in granitic rocks described to date. Based on the microperthitic textures and Ba-distribution patterns, resorption of primary plagioclase during the growth of interstitial alkali feldspar might contribute to the formation of the microperthitic alkali feldspar in the granodiorite of C11. Barium-zoning patterns are principally magmatic (C13 alkali feldspar), but they were modified during the formation of microperthite (C11 alkali feldspar) at cooling.

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Drilling procedures, techniques and test results for a 3.7 km deep, 500°C exploration well, kakkonda, japan

Cited by 36 publications

References 4 publications

Cationic surfactant (CTAB) a multipurpose additive in polymer-based drilling fluids

Cationic surfactant (CTAB) a multipurpose additive in polymer-based drilling fluids

Static Formation Temperature Prediction Based on Bottom Hole Temperature

Microtexture and compositional variation of alkali feldspars from the Kakkonda granitic pluton, northeast Japan: Implications to the formation processes of granitic texture

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