Youqi dizhi yu caishoulu (Sep 2024)
Development technology progress of heavy oil reservoirs in Shengli Oilfield
Abstract
In view of the geological characteristics and development contradictions of different types of heavy oil reservoirs in Shengli Oilfield， a set of development technologies for heavy oil reservoirs have been developed， and remarkable development achievements have been obtained. In this paper， the progress of development technologies for different types of heavy oil reservoirs was summarized in the theoretical basis and the field application. For heavy oil reservoirs after many rounds of huffing and puffing， the well pattern infilling technology was formed based on the non-Darcy flow theory. For sensitive heavy oil reservoirs， the adverse impact of water sensitivity on development was reduced based on the proposed theory of near heat and remote prevention. For extra-heavy oil reservoirs， HDCS technology was applied through the synergistic viscosity reduction and energy enhancement due to the expansion to solve the development problem of difficult injection and production. For inefficient water-flooding heavy oil reservoirs， the flow lines of infilled corner wells and water wells were changed by turning to steam flooding to enhance oil recovery. For deep heavy oil reservoirs， the multi-thermal composite oil displacement theory was formed， and deep heavy oil reservoirs were effectively produced based on the understanding of the synergistic interaction mechanism of gas-heat synergy for heat retention and enhancing steam chamber， heat-agent synergy for replacing viscosity reduction and improving flooding， and gas-agent synergy for thermal front equilibrium. For thin heavy oil reservoirsthe steam absorption capacity and production ranges were improved through the thermal and horizontal well composite development model. For shallow extra-heavy oil reservoirs， HDNS technology was used to enhance the energy， reduce viscosity， and expand the spread， realizing efficient development. The application of development technologies for heavy oil reservoirs in Shengli Oilfield provides technical support for the beneficial development and green development of heavy oil in Shengli Oilfield.
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