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Current status and prospects of drilling waste management industry in China

With Chinese oil industry development and drilling fluid technology update in rent years, more and more oilfields are using oil-based drilling fluid, which brings great benefits to drilling engineering, but poses a series of problems at the same time, that is, how to manage the used drilling waste? China had put forward very strict requirements on oilfield environmental protection for while-drilling waste treatment, which is rarely seen from the national legislative level. This means that Chinese drilling waste service market has been opened now. Nowadays, there has been a great demand for drilling waste management in every oilfield. KOSUN has received related consultations from many oilfield customers. We also sent persons to visit these customers to know their current conditions and dema

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Development and application of new drilling fluid system

Development of drilling fluid system and additives is facing new breakthroughs to adapt to requirements of deep well, ultra deep well and complex formation drilling and increasingly valued environmental requirements, as well as further reduce drilling cost. New treatment agents have to adapt to ultra deep well requirements with stable temperature resistant performance and environmentally friendly, preventing formation damage and later environmental problems. New synthetic base drilling fluid will have further development. With deepening of environmental protection philosophy, environmentally friendly drilling fluid is leads the development trend. Low toxicity and non-toxic oil-based drilling fluid is given more attention. Due to rapid development of synthetic base drilling fluid, it has be

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Future Development Direction for New Technologies of Drilling Fluids

The importance attached to unconventional oil and gas resources, especially shale oil and gas development through horizontal well, shows unique advantage of oil-based drilling fluid on shale formation. It is proved that oil-based drilling fluid is the prime choice for shale gas horizontal well construction. It is clear that oil-based drilling fluid ushers in a new development opportunity. Although oil-based drilling fluid has been developing rapidly for the past two years, it is still less competitive compared with the foreign one and there is much room for improvement. Next emphasis is how to strengthen additives and theoretical research by virtue of successful foreign experience and preliminary domestic experience, focusing on demand for oil-based drilling fluid. Perfect supporting oil-b

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A gas field over a hundred billion cubic meters discovered in Tarim Oilfield

Recently, the Bozi No. 9 Well of PetroChina Tarim Oilfield Company was successfully tested, and it has obtained high-yield industrial oil and gas flow with a daily natural gas of 418,200 cubic meters and the condensate oil of 115.15 cubic meters. It is another 100-billion cubic meters gas field discovered in the southern part of Mount Tianshan in the Tarim Oilfield within one year, which marks the birth of the second trillion-cubic meters gas area in the Tarim Basin. The Bozi No. 9 Well is a pre-exploration well in the Kelasu tectonic zone of the Kuqa Depression in the Tarim Basin. Its spud-in was in October 2017 and the drilling was finished in March 2019. It is an ultra-deep well with a depth of 7880 meters. Tian Jun, deputy general manager of Tarim Oilfield Company, said that the succes

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Sources of drilling fluid additives

It is investigated that core products in mud system of the foreign-invested mud companies come from abroad. It is partly because they have their own research development and production base abroad, and further, domestic drilling fluid additives cannot conform to high standards. Low-end products with low technological content and cheap price are purchased locally, such as barite, bentonite, sodium chloride, xanthan gum, etc. This not only guarantees need of drilling engineering, but also achieves profit maximization of drilling fluid additives. For core products in mud system, drilling fluid companies affiliated with CNPC, Sinopec and CNOOC all have their own additives production base or cooperators, as well as independent R D team for new materials and products. They purchase conventional

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Main Drilling Fluid Types in the Chinese Market (II)

7) Gypsum drilling fluid Basic components: gypsum, SMC, SMP, SMT, FCLS, etc. Features: By use of the common ion effect, add gypsum to inhibit the gypsum dissolution in formation. 8) MMH drilling fluid Basic components: bentonite, mixed metal hydroxides (MMH), filtrate reducer and viscosity reducer Features: MMH can provide a unique rheological property and owns the strong ability of inhibiting the formation hydration dispersion; meanwhile, use filtrate reducer, which does not destroy MMH-clay complex structure, to control filtrate loss. 9) Potassium-silicon-based drilling fluid Basic components: KPAM, silicon stabilizer, silicon thinner, GKHm, SMP, and sulfonated asphalt products Features: use silicon to stabilize shale and reduce the water wettability of formation, with a strong inhibitiv

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Main Drilling Fluid Types in the Chinese Market (I)

1) Solids-free non-dispersed polymer drilling fluid Basic components: polyacrylamide or multiple vinyl copolymer flocculant, inorganic salt, etc. Features: flocculant can effectively flocculate cuttings generated in the drilling process. 2) Anionic polymer drilling fluid Basic components: multiple vinyl copolymers, hydrolyzed polyacrylonitrile, partially hydrolyzed polyacrylamide, etc. Features: high molecular weight polymer encapsulates clay or cuttings and provides viscosity and shear force required for drilling fluid; medium and low molecular weight polymers can control filtrate loss, viscosity and shear force. 3) Cationic polymer drilling fluid Basic components: high and low molecular weight cationic polymer, starch, etc. Features: cationic polymer has the highly powerful ability of st

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