AMEC is among the oil equipment services stocks helping lift the sector higher after the engineer and project management giant today confirmed it has made a conditional offer to buy Australian engineering services company GRD. Oil and gas producers are lower though, in spite of continued rises in the oil price, with a barrel of crude moving above $72. Shell and BP fall back.AstraZeneca is helping lift the pharmaceutical sector after the drug giant said reported broadly positive results from a US Food and Drug Administration review of the use of the bipolar disorder treatment Seroquel in children and teenagers.Top performing sectors so far todayIndustrial Metals 4,721.04 +3.01%Banks 4,017.10 +2.11%Mobile Telecommunications 2,634.01 +2.01%Pharmaceuticals & Biotechnology 7,264.95 +1.51%Oil Equipment Services & Distribution 12,861.22 +1.44%Bottom performing sectors so far todayIndustrial Transportation 1,626.54 -1.31%Automobiles & Parts 2,086.95 -0.94%Beverages 6,046.67 -0.88%Oil & Gas Producers 7,416.12 -0.79%Insurance (non-life) 1,189.24 -0.75%