Bottomhole acidizing
Efficient method of recovery and improvement of skin zone filtration characteristics to improve performance of producing wells and injectivity.
Цели и задачи:
- improving performance of producing wells and injectivity;
- incremental oil production;
- bottomhole zone pollution abatement;
- improvement of bottomhole zone filtration characteristics;
- introduction of by-passed oil;
- pumping equipment maintenance (cleaning from scale);
The range of application:
- type of a reservoir: carbonate, terrigenous
The need to carry out such complex projects is connected with the following factors:
- reserve recovery complexity increase;
- underexploration of most fields;
- increase of resources necessary to analyze fields geology and development in more details;
- lack of well-qualified personnel and work load of departments.
Technology process
- Services:
- the selection of candidate wells;
- the selection and laboratory tests of acid solution;
- the selection of technology / design planning;
- bottomhole treatment performance;
- bottomhole treatment analysis;
- Technologies:
- acidizing of vertical / horizontal wells;
- acidizing before remedial cementing;
- acidizing of pumping equipment;
- alternative acid solutions;
- foam-acid treatment;
- selective acidizing;
- removing of reaction products by: swabbing, nitrogen, jet pump;
Distinctive features:
- individual approach and comprehensive assessment of every well, and result integration of well testing when selecting candidate wells;
- individual design on the basis of bottomhole treatment purpose;
- supervising work performance – the control of acid solution quality;
- prompt recommendation on improvement of bottomhole treatment;
- application of bottomhole treatment results to plan further treatments and their efficiency improvement step-by-step;
Physical-chemical methods of oil recovery improvement
Effective methods for oil recovery factor improvement, conformance control, and slowdown of oil production decline due to water cut control.
Goals and objectives:
- the rational use of injected water energy at the late stage of oil field development;
- recovery of remaining oil in place from watered layers;
- efficiency improvement of oil and gas displacement;
- optimisation of hydrocarbon production due to development of supplementary discovery;
- incremental oil production;
Distinctive features:
- selecting candidate wells carefully taking into account geological characteristics and pressure and temperature conditions of a field;
- application of the testing results (hydrodynamic, tracer) when designing a programme of physical-chemical methods of oil recovery improvement;
- successful practices of treatment of fields with carbonate and terrigenous reservoirs;
- commitment to eventual results - incremental hydrocarbon production by developing supplementary discovery;
The range of results application:
- type of a reservoir: carbonate, terrigenous;
- high water cut;
- low volumetric efficiency;
- reservoirs characterized by water influx (high-permeability sublayers);
- high permeable heterogeneity;
Technology process:
- the selection of candidate wells: well testing and geological and technological model;
- the selection of technique and calculation of injectivity;
- assessment of processing efficiency;
- analysis of implemented physical-chemical methods of oil recovery improvement;
