PART 4Equipment and Operations (continued)
Wells, Installations, Equipment, Facilities and Support Craft (continued)
26 The operator shall ensure that
(a) the components of an installation and well tubulars, Christmas trees and wellheads are operated in accordance with good engineering practices; and
(b) any part of an installation that may be exposed to a sour environment is designed, constructed and maintained to operate safely in that environment.
(2) If it is not possible to rectify the defect without delay, the operator shall ensure that it is rectified as soon as the circumstances permit and that mitigation measures are put in place to minimize the hazards while the defect is being rectified.
Drilling Fluid System
28 The operator shall ensure that
(a) the drilling fluid system and associated monitoring equipment is designed, installed, operated and maintained to provide an effective barrier against formation pressure, to allow for proper well evaluation, to ensure safe drilling operations and to prevent pollution; and
(b) the indicators and alarms associated with the monitoring equipment are strategically located on the drilling rig to alert onsite personnel.
(a) furnishing access to the well;
(b) isolating the well-bore from the sea;
(c) withstanding the differential pressure of the drilling fluid relative to the sea;
(d) withstanding the physical forces anticipated in the drilling program; and
(e) permitting the drilling fluid to be returned to the installation.
(2) The operator shall ensure that every marine riser is supported in a manner that effectively compensates for the forces caused by the motion of the installation.
30 The operator shall ensure that adequate equipment, procedures and personnel are in place to recognize and control normal and abnormal pressures, to allow for safe, controlled drilling operations and to prevent pollution.
Reference for Well Depths
31 The operator shall ensure that any depth in a well is measured from a single reference point, which is either the kelly bushing or the rotary table of the drilling rig.
Directional and Deviation Surveys
32 The operator shall ensure that
(a) directional and deviation surveys are taken at intervals that allow the position of the well-bore to be determined accurately; and
(b) except in the case of a relief well, a well is drilled in a manner that does not intersect an existing well.
Formation Leak-Off Test
33 The operator shall ensure that
(a) a formation leak-off test or a formation integrity test is conducted before drilling more than 10 m below the shoe of any casing other than the conductor casing;
(b) the formation leak-off test or the formation integrity test is conducted to a pressure that allows for safe drilling to the next planned casing depth; and
(c) a record is retained of each formation leak-off test and the results included in the daily drilling report referred to in paragraph 83(a) and in the well history report referred to in section 88.
Formation Flow and Well Testing Equipment
(a) the equipment used in a formation flow test is designed to safely control well pressure, properly evaluate the formation and prevent pollution;
(b) the rated working pressure of formation flow test equipment upstream of and including the well testing manifold exceeds the maximum anticipated shut-in pressure; and
(c) the equipment downstream of the well testing manifold is sufficiently protected against overpressure.
(2) The operator of an offshore well or a well in a sour environment shall ensure that the formation flow test equipment includes a down-hole safety valve that permits closure of the test string above the packer.
(3) The operator shall ensure that any formation flow test equipment used in testing an offshore well that is drilled with a floating drilling unit has a subsea test tree that includes
35 The operator shall ensure that adequate procedures, materials and equipment are in place and utilized to minimize the risk of loss of well control in the event of lost circulation.
36 (1) The operator shall ensure that, during all well operations, reliably operating well control equipment is installed to control kicks, prevent blow-outs and safely carry out all well activities and operations, including drilling, completion and workover operations.
(2) After setting the surface casing, the operator shall ensure that at least two independent and tested well barriers are in place during all well operations.
(3) If a barrier fails, the operator shall ensure that no other activities, other than those intended to restore or replace the barrier, take place in the well.
(4) The operator shall ensure that, during drilling, except when drilling under-balanced, one of the two barriers to be maintained is the drilling fluid column.
37 The operator shall ensure that pressure control equipment associated with drilling, coil tubing, slick line and wire line operations is pressure-tested on installation and as often as necessary to ensure its continued safe operation.
38 If the well control is lost or if safety, environmental protection or resource conservation is at risk, the operator shall ensure that any action necessary to rectify the situation is taken without delay, despite any condition to the contrary in the well approval.
Casing and Cementing
39 The operator shall ensure that the well and casing are designed so that
(a) the well can be drilled safely, the targeted formations evaluated and waste prevented;
(b) the anticipated conditions, forces and stresses that may be placed upon them are withstood; and
(c) the integrity of gas hydrate and permafrost zones — and, in the case of an onshore well, potable water zones — is protected.
40 The operator shall ensure that the well and casing are installed at a depth that provides for adequate kick tolerances and well control operations that provide for safe, constant bottom hole pressure.
41 The operator shall ensure that cement slurry is designed and installed so that
(a) the movement of formation fluids in the casing annuli is prevented and, where required for safety, resource evaluation or prevention of waste, the isolation of the oil, gas and water zones is ensured;
(b) support for the casing is provided;
(c) corrosion of the casing over the cemented interval is retarded; and
(d) the integrity of gas hydrate and permafrost zones — and, in the case of an onshore well, potable water zones — is protected.
Waiting on Cement Time
42 After the cementing of any casing or casing liner and before drilling out the casing shoe, the operator shall ensure that the cement has reached the minimum compressive strength sufficient to support the casing and provide zonal isolation.
Casing Pressure Testing
43 After installing and cementing the casing and before drilling out the casing shoe, the operator shall ensure that the casing is pressure-tested to the value required to confirm its integrity for maximum anticipated operating pressure.
44 The operator shall ensure that the production tubing used in a well is designed to withstand the maximum conditions, forces and stresses that may be placed on it and to maximize recovery from the pool.
Monitoring and Control of Process Operations
45 The operator shall ensure that
(a) operations such as processing, transportation, storage, re-injection and handling of oil and gas on the installation are effectively monitored to prevent incidents and waste;
(b) all alarm, safety, monitoring, warning and control systems associated with those operations are managed to prevent incidents and waste; and
(c) all appropriate persons are informed of the applicable alarm, safety, monitoring, warning or control systems associated with those operations that are taken out of service, and when those systems are returned to service.
(a) it is completed in a safe manner and allows for maximum recovery;
(b) except in the case of commingled production, each completion interval is isolated from any other porous or permeable interval penetrated by the well;
(c) the testing and production of any completion interval are conducted safely and do not cause waste or pollution;
(d) if applicable, sand production is controlled and does not create a safety hazard or cause waste;
(e) each packer is set as close as practical to the top of the completion interval and that the pressure testing of the packer to a differential pressure is greater than the maximum differential pressure anticipated under the production or injection conditions;
(f) if practical, any mechanical well condition that may have an adverse effect on production of oil and gas from, or the injection of fluids into, the well is corrected;
(g) the injection or production profile of the well is improved, or the completion interval of the well is changed, if it is necessary to do so to prevent waste;
(h) if different pressure and inflow characteristics of two or more pools might adversely affect the recovery from any of those pools, the well is operated as a single pool well or as a segregated multi-pool well;
(i) after initial completion, all barriers are tested to the maximum pressure to which they are likely to be subjected; and
(j) following any workover, any affected barriers are pressure-tested.
(2) The operator of a segregated multi-pool well shall ensure that
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