Knowledge

HPHT wells are characterized by:High Pressure, reservoir pressure greater than 10,000 psi.High Temperature, reservoir temperature exceeding 300°F (149°C).

Sliding sleeves–sometimes called sliding side doors (SSDs) – are manipulated by wireline locks and use nipple profiles. The figure below shows a typical siding sleeve. This sleeve uses a collet to ‘hold’ the sleeve in one of three positions (open, equalizing, and closed). Sliding sleeves have earned a poor reputation – they either fail to open or close. Scale, asphaltene, solid debris, or erosion are the leading causes of these problems. Indeed, producing at high rates or through small ports can cause problems, as can trying to open or close a sleeve at high angles or with considerable differential pressures. Sliding sleeves form the basis of modern surface-controlled downhole flow control.

Well Completions is an integral and significant part of the Oil and Gas Industry. It dictates the techniques and usage of various down-hole tools that play an important role in ensuring that the reservoir fluids reach the surface. Also ensuring that the producing zones are isolated from the Non-Producing Zones. The primary functionality begins with preparing the area around the pay-zone and servicing it. In the due course of drilling operations, the formation deals with high amounts of invasive and heavy fluids such as drilling mud or cement, which is used to secure the well from collapsing on itself and negating the flow of hydrocarbons from other zones. Maintaining a negative or a zero skin factor is imminent in ensuring that the well has good productivity, as it enables the free flow of the hydrocarbons into the tubing. To maintain this, regular servicing of the well such as hydraulic fracturing, acidization, well stimulation, etc., can be put to effective usage. One can state that well completions ensure the fact that the well is ready for production or injection as per the well placement and well depth.

Efficiency and cost-effectiveness are the prime keys in the dynamic world of hydraulic fracturing. Among the choices of material during well completions, there will be a significant impact on successful operations in the field. Among all of these, composite frac plug material has been one of the revolutionary solutions brought before oil and gas operators. Here, we shall look into the top five advantages of this cutting-edge material and why it is becoming a gold standard for well completions.

Horizontal directional drilling (HDD) has been an established technique since the 1930s, though it was originally used to provide relief to wells under enormous pressure. In fact, it was recognized at the national level after the process was used to save a large oil field in Conroe, Texas. Horizontal directional drilling is still used to relieve high pressure wells, but now it has an even more important application – increasing productivity in gas wells, particularly in shale plays.