Fewer wells with higher production! CNOOC's First Multifunctional High-Low Pressure Layered Completion Technology Successfully Implemented

Recently

Ltd. Zhanjiang Branch

(hereinafter referred to as Limited Zhanjiang)

(hereinafter referred to as Limited Zhanjiang) has successfully implemented the first

The first successful implementation of

Multi-functional high and low pressure layered completion technology

in the same well

realising the development of multi-layer complex fracture block reservoirs in the same well

Reduced the number of well pads used

Reduces development costs

Improve resource utilisation efficiency

Achieve ‘high production with fewer wells’.

Currently

The well is in the early stage of draining

Obtained high oil and gas production

Middle and late stage of oil and gas field development

High development cost of low-grade oil and gas field

Tight well slot and other problems are highlighted

‘Fewer wells with higher production’ has become the

the urgent need for oil and gas development.

Weizhou 11-4N oilfield is a typical

Complex fault block reservoir

The upper part of the field is a loose, normal pressure stratum

The lower part is a dense high-pressure stratum

The difference in pressure coefficient between layers is 0.65

Under the traditional development mode

High cost of multi-well development

Low production of single well

Poor economic efficiency

While single well development needs to overcome

High and low pressure coexisting well leakage control

sand control in loose layers

Layered mining and other difficulties

Limited Zhanjiang precisely responds to this demand

Starting from the integration of geological engineering

Multi-specialty linkage and active exploration

Innovative multi-functional high and low pressure layered completion technology

It can meet the requirements of high and low pressure asynchronous mining and sand prevention in loose layers.

This technology is used to

Shooting holes to open the upper loose and normal-pressure stratum

Lowering the suspended tubing column and carrying the hole-shooting gun

Directly facing the dense high-pressure layer

Layering sand control in the upper stratum

After installing the tree

Final hole shot to open the tight high-pressure layer

Compared with conventional completion mode

Saving the time of a single trip of central isolation tubing insertion operation

Improve operation efficiency by 15%

At the same time

Effectively prevents

preventing the risk of well control and leakage when high and low pressure coexist in the well

Maximum protection of

wellbore safety and storage and protection effect

The successful implementation of this technology

effectively solved the problem of

The development of multi-layer complex fracture block oil reservoirs

economic and drilling and completion quality and safety problems

for accelerating the development of oil and gas resources in the western part of the South China Sea

provides strong technical support

It also provides a model for the development of similar reservoirs in China

Provides a model for the development of similar reservoirs in China