Introduction to hydraulic fracturing

Hydraulic fracturing is a broad prospect for oil and gas well stimulation , hydraulic fracturing method is the main form of exploitation of natural gas , requiring the incorporation of chemical substances with plenty of water poured into the hydraulically fracture shale to release natural gas. The technology in 10 years in the United States to promote a wide range , but the Americans are worried that the technology will pollute the water , thus threatening the local ecological environment and the health of residents . And that the technology to bring great harm to the environment , including water so spontaneous combustion , causing a small earthquake. Opponents point out the potential environmental impacts, including contamination of groundwater , freshwater depletion, air quality risks , gases and  maide hydraulic fracturing benifits chemicals to migrate to the surface , the surface leakage and backflow contamination , as well as the impact of these issues on health.Principle: Hydraulic fracturing is the use of ground pressure pump , squeeze with higher viscosity fracturing fluid to the reservoir through the wellbore . When maide hydraulic fracturing proppant fluid injection rate exceeds the absorption capacity of the reservoir , a high pressure is formed in the bottom reservoir, when such pressure exceeds the fracture pressure near the bottom of the reservoir rock , and oil will be pressed open cracks . At this time, continue to keep the oil squeeze fracturing fluid reservoir internal cracks will continue to expand . In order to maintain pressure to open cracks in the open state , then squeeze the oil sand-carrying fluid with proppant ( usually quartz sand ) , followed by sand-carrying fluid into the cracks , one can make the cracks continue to extend forward , on the other hand can support the opening pressure has cracks Without limiting closed . Followed by injection of fluid replacement , the wellbore fluid carrying sand into the cracks of all replacement with quartz sand to prop up the cracks . Finally , the high viscosity fracturing fluid injected degradation automatically discharged outside the borehole , leaving the one or more reservoir length , width , height ranging from cracks that establish a new path between the fluid reservoir and the wellbore . After fracturing, production of oil and gas wells are generally substantial growth.

Oil and gas fracturing proppant ceramic sand

Oil fracturing proppant ( ceramic sand ) is a ceramic particle product with high fracture strength , mainly for oilfield downhole support to increase production of oil and maide Shale gas revolution , an environmentally friendly product .
    This product is the use of high-quality bauxite , coal and other raw materials, ceramic sintering , is a substitute for natural quartz sand , glass beads , metal balls and other low- strength proppant , to increase production of oil and gas has a positive effect .
When oil and maide gas fracking exploration in deep , high pressure low permeability deposit closure after fracturing treatment, the rock cracked petroleum , oil and gas from the cracks in the channel formed by the pooled out. Along with a high-pressure high-alumina support material was filled into the formation in rock fissures , cracks do not play a supporting but closed due to stress release , thereby maintaining high conductivity , so that the oil and gas flow, increase production. Practice has proved that the use of high-alumina proppant fracturing wells can increase production by 30-50% , but also to extend the service life of oil and gas wells , is the key material oil, gas wells in low permeability oil and gas exploration, construction . Products used in deep fracturing when it is filled to the low permeability fractured rock deposits in high closed fracturing treatment to split hydrocarbon formations , play a supporting fissure is closed not because of stress release , thereby maintaining oil and gas high flow capacity , not only to increase oil and gas production , and more to extend the service life of oil and gas wells .

How brief is operated drilling machine

Can not do without the use of large-scale drilling engineering drilling machine equipment , and its good performance greatly enhance the speed and efficiency of drilling , especially in remote areas more extensive drilling machine with the crowd , then drilling machine in the end is how it works ?
Work drilling machine is pumping reverse circulation . Its working principle is: the role of atmospheric pressure , circulating liquid from the settling tank through the ring back to the ditch along the bottom of the borehole flow gap , because the turntable drive maide well drilling , rotary drill bit for drilling drive , negative pressure created by the suction of the mud debris drill mud suction lumen , then rose to tap into the sedimentation tank through mud circulating liquid precipitation continues to flow into the well bore , so again and again , forming a reverse circulation the drilling work .
Drill mud or water from entering the outflow from the wellhead . Positive circulation drilling machine . Mud or suck out water from the drill pipe from the wellhead inflows. To reverse circulation drilling machine . Reverse circulation drilling means ( mud or water ) in the drilling machine cycle way of saying , drilling rig will drill in drilling when generating muck , slag stone, by reverse circulation can bring these scum from the mud to the ground , and then through the mud after the settler back to drilling. Such non-stop cycle , and finally into the hole . Reverse circulation can bring out a larger diameter slag.

Hydraulic fracturing process

Many media reports, hydraulic fracturing is not a " drilling process ." , After the completion of drilling using Maide hydraulic fracturing benifits . Simply put, is the use of hydraulic fracturing fluids and materials , create or restore the formation of small well fracking to stimulate the production of new and existing oil and gas wells. This creates a path to increase the rate of fluid can be produced from the reservoir, in some cases , by the many hundreds of percent, the method comprising the following steps to protect the water supply . To ensure that neither the final fluid to be pumped through the hole , nor will eventually be collected by the oil or gas into the water, surface or intermediate casing steel insert well depth between 1,000 and 4,000
Feet. These sleeves " string" and drilling ( wells ) , known as the space between the rings are filled cement. Once the cement , and then continue drilling or transition from the ground to the bottom of the next depth carburizing steel housing. This process is repeated , using smaller steel casing each time , until it reaches the oil and gas reservoirs ( typically 6,000 to 10,000 feet ) . The following diagram is a typical Eagle Ford Shale wells of a promotion in south-central Texas . Here there is a more detailed housing and groundwater protection role.

Resin coated sand used in oilfield fracturing of

Hydraulic fracturing technology after half a century of development , has become a major oil and gas well stimulation Measures . The main mechanism of hydraulic fracturing of oil and gas wells and injection wells yield increase is due to the injection of proppant Supporting role for cracks to form in the formation long enough , has a certain conductivity The sand filling cracks. Visible, proppant Maide fracturing sand effect on impact can not be ignored , proppant material Performance directly affects the fracture conductivity , and therefore is a key factor affecting the hydraulic fracking effect . Branch Performance degree and the greatest impact on the conductivity proppant compressive strength and size is a combination of support agent. Therefore , the proper selection and use of appropriate proppant leaf out key measures of value-added production . A

Kind of ideal proppant should have the following characteristics : high compressive strength , the pressure to adapt The purpose of cracking under the pressure of a closed layer wonder broken, the biggest support puzzled crack width , with Have a lower density , in order to ensure ease of delivery of the pump in the construction process , and in the cracks Press Expected requirements laid ; in hot brine good chemical inertness, not hydraulic fracturing fluid and reservoir fluid

Chemical reaction , to avoid contamination with the fracture proppant , uniform particle size distribution , circularity For Find a good read , with better purity and low impurity levels , in order to avoid air strikes proppant fractures

The lower conductivity ; sources wider, low cost. Usually applied pressure for proppant Effective fracture closure pressure , the proppant is thus preferably be used as an effective closing pressure proppant Under pressure.

Low-density proppant phenolic / epoxy composites modified

Using liquid phenolic resin impregnated , coated with epoxy resin and then prepared in a nut shell is a low-density proppants matrix composite materials, through INSTRON universal testing machine , TGA, SEM and other testing methods to test the performance of composite materials . Research shows that the concentration of proppant supplier resin was impregnated to 70% , the composite material under pressure 60MPa with a minimum amount of deformation ; particles coated with increasing amounts of the epoxy resin layer , the deformation of the composite decreased pressure at 60MPa when the resin is greater than 25% , the amount of deformation changes little ; TGA improved heat resistance , the composite material ; SEM found uncoated surface modified particles with more holes , the composite coating of the modified surface smooth , holes significantly reduced ; micrograph display uncoated modified particles 60MPa pressure serious rupture , but not broken composite phenomenon, and there is a clear resin particle surface layer ; absorbing capacity from 30.45% down to 6.58% , solvent resistance improved significantly.

The new fracturing fluid

The new fracturing fluid investment environment analysis, the need for Beijing and development of new fracturing fluid project overview , the new fracturing fluid project , the new natural gas fracturing fluid industry competition pattern analysis , new fracturing fluid industry financial indicators of reference , the new hydraulic fracking fluid industry market analysis and the scale of construction , the new fracturing fluid condition and location of the project construction program , the new fracturing fluid project uncertainty and risk analysis , new fracturing fluid industry development trend analysis