Compound Cementing Agent for Sands

Details:

AU-20 Cementing agent compound oil sands

Abundant heavy oil resources in the world, China holds considerable reserves. Accelerate the pace of heavy oil development is the main way to increase production. However, due to heavy oil itself has a high viscosity, density, pomobility, to the heavy oil has brought many difficulties, especially the structure of the sandstone formation as the main component areas, loose strata cemented. The continuous erosion in the formation fluid, the sbetween the destruction of the cement, so that formation strength reduced, there are often scollapse, blocking the oil spore. What is more, due to heavy sand-carrying capacity, oil production often occurs when the pump is forced to stop production of scard, resulting in workover operations quite frequently, apparently to increase oil production costs, which seriously affect the production of crude oil, at present, domestic, foreign general to overcome the following two methods, one is the use of mechanical scontrol method, which uses the tube pieces of metal around the wire sieve sfilling process, is winding down to the bottom steel mesh to prevent formation sflow to the wellbore caused by card pump full bore, some cotton mesh metal sand, sthe wire around the anchwith sand, although they are now well-established methods of sand, but also has its limitations. First, the wire-wrapped sscreens pieces after the filling process, as well the complex structure of the body, thus causing inconvenience to future workover. Second, the fine powder sreservoir, due to the width of the gap around the wire-tube limit, the effect of its anti-posand. Third, the wire-wrapped screens pieces filled with soperating costs high, in addition, such as metal cotton net sand, wire-wrapped sanchsand, which control the formation of sas there are like wire-wrapped screens pieces filled with craft sas the shortcomings, large scale production is difficult to use. Another method is to use chemical sand, making it a chemical reaction with the oil sands, cemented in the sstratum, without affecting the normal oil production of heavy oil wells, the current foreign domestic production of high-temperature solid sagents, although some time can play a role in solid sand, but the period is short, because the synthetic material is tetramethylsilane, the production is very difficult, resulting in sconsolidation agent expensive affect its application.
High-performance composite oil sands cementing agent, it is not only adapted to the formation temperature higher than 200 °C more, can also be adapted to the formation temperature below 200 °C less. Play Sobvious effect, the bond agent fast, high strength, on-site construction process is simple, short, very large scale value, is a new type of heavy oil sconsolidation agent fheavy oil production has opened up a New Road.

Specification:
(1) Appearance: white solid;
(2) temperature: 200 ~ 350 °C;
(3) Compressive strength: 350 °C under 6 days, compressive strength of 6MPa;
(4) penetration retention:> 90%